Nouveau - Oct 2016 - [Bug 98240] New: Kernel module fails to load on HP Pavilion V3A33AV laptop.

https://bugs.freedesktop.org/show_bug.cgi?id=98240

            Bug ID: 98240
           Summary: Kernel module fails to load on HP Pavilion V3A33AV
                    laptop.
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: sos at sokhapkin.dyndns.org
        QA Contact: xorg-team at lists.x.org

The laptop has NVIDIA® GeForce® GTX 960M discrete chip at PCI:01:00.0

01:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 960M] (rev a2)

Using 4.8.1 kernel, here is dmesg of "modprobe nouveau debug=spam":

[ 4620.345670] ACPI Warning: \_SB.PCI0.GFX0._DSM: Argument #4 type mismatch -
Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[ 4620.345756] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[ 4620.345862] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[ 4620.346999] pci 0000:01:00.0: optimus capabilities: enabled, status dynamic
power, 
[ 4620.347006] VGA switcheroo: detected Optimus DSM method \_SB_.PCI0.PEG0.PEGP
handle
[ 4620.347007] nouveau: detected PR support, will not use DSM
[ 4620.347890] nouveau 0000:01:00.0: NVIDIA GM107 (1171b0a2)
[ 4620.347968] nouveau 0000:01:00.0: pci: MSI enabled
[ 4620.347973] nouveau 0000:01:00.0: bios: trying PRAMIN...
[ 4620.347986] nouveau 0000:01:00.0: bios: ... not enabled
[ 4620.347989] nouveau 0000:01:00.0: bios: trying PROM...
[ 4620.353937] nouveau 0000:01:00.0: bios: 00000000: ROM signature (0000)
unknown
[ 4620.353939] nouveau 0000:01:00.0: bios: image 0 invalid
[ 4620.353946] nouveau 0000:01:00.0: bios: scored 0
[ 4620.353947] nouveau 0000:01:00.0: bios: trying ACPI...
[ 4620.354437] nouveau 0000:01:00.0: bios: 00000000: type 00, 65536 bytes
[ 4620.354784] nouveau 0000:01:00.0: bios: 00000000: checksum failed
[ 4620.355094] nouveau 0000:01:00.0: bios: 00010000: type e0, 37376 bytes
[ 4620.355513] nouveau 0000:01:00.0: bios: 00019200: ROM signature (0000)
unknown
[ 4620.355513] nouveau 0000:01:00.0: bios: image 2 invalid
[ 4620.355514] nouveau 0000:01:00.0: bios: scored 6
[ 4620.355515] nouveau 0000:01:00.0: bios: using image from ACPI
[ 4620.355588] nouveau 0000:01:00.0: bios: BIT signature found
[ 4620.355589] nouveau 0000:01:00.0: bios: version 82.07.9b.00.69
[ 4620.355592] nouveau 0000:01:00.0: bios: DCB contains no useful data
[ 4620.355592] nouveau 0000:01:00.0: bios: DCB contains no useful data
[ 4620.355593] nouveau 0000:01:00.0: mxm: no VBIOS data, nothing to do
[ 4620.355603] nouveau 0000:01:00.0: bios: DCB contains no useful data
[ 4620.355995] nouveau: DRM:00000000:00000000: ioctl: size 32
[ 4620.355996] nouveau: DRM:00000000:00000000: ioctl: vers 0 type 00 object
0000000000000000 owner 00
[ 4620.355997] nouveau: DRM:00000000:00000000: ioctl: nop size 8
[ 4620.355997] nouveau: DRM:00000000:00000000: ioctl: nop vers 0
[ 4620.355998] nouveau: DRM:00000000:00000000: ioctl: return 0
[ 4620.356001] nouveau: DRM:00000000:00000000: ioctl: size 72
[ 4620.356002] nouveau: DRM:00000000:00000000: ioctl: vers 0 type 02 object
0000000000000000 owner ff
[ 4620.356002] nouveau: DRM:00000000:00000000: ioctl: new size 48
[ 4620.356003] nouveau: DRM:00000000:00000000: ioctl: new vers 0 handle
00000000 class 00000080 route 00 token ffff8802591e50d8 object ffff8802591e50d8
[ 4620.356004] nouveau: DRM:00000000:00000000: ioctl: create device size 16
[ 4620.356004] nouveau: DRM:00000000:00000000: ioctl: create device v0 device
ffffffffffffffff
[ 4620.356005] nouveau: DRM:00000000:00000080: init running...
[ 4620.356006] nouveau 0000:01:00.0: preinit running...
[ 4620.356006] nouveau 0000:01:00.0: pci: preinit running...
[ 4620.356007] nouveau 0000:01:00.0: pci: preinit completed in 0us
[ 4620.356008] nouveau 0000:01:00.0: bios: preinit running...
[ 4620.356008] nouveau 0000:01:00.0: bios: preinit completed in 0us
[ 4620.356009] nouveau 0000:01:00.0: devinit: preinit running...
[ 4620.356024] nouveau 0000:01:00.0: devinit: preinit completed in 14us
[ 4620.356024] nouveau 0000:01:00.0: top: preinit running...
[ 4620.356025] nouveau 0000:01:00.0: top: preinit completed in 0us
[ 4620.356025] nouveau 0000:01:00.0: priv: preinit running...
[ 4620.356058] nouveau 0000:01:00.0: priv: preinit completed in 33us
[ 4620.356059] nouveau 0000:01:00.0: gpio: preinit running...
[ 4620.356060] nouveau 0000:01:00.0: gpio: preinit completed in 0us
[ 4620.356060] nouveau 0000:01:00.0: i2c: preinit running...
[ 4620.356061] nouveau 0000:01:00.0: i2c: preinit completed in 0us
[ 4620.356061] nouveau 0000:01:00.0: fuse: preinit running...
[ 4620.356062] nouveau 0000:01:00.0: fuse: preinit completed in 0us
[ 4620.356062] nouveau 0000:01:00.0: mxm: preinit running...
[ 4620.356063] nouveau 0000:01:00.0: mxm: preinit completed in 1us
[ 4620.356063] nouveau 0000:01:00.0: mc: preinit running...
[ 4620.356064] nouveau 0000:01:00.0: mc: preinit completed in 0us
[ 4620.356064] nouveau 0000:01:00.0: bus: preinit running...
[ 4620.356065] nouveau 0000:01:00.0: bus: preinit completed in 0us
[ 4620.356065] nouveau 0000:01:00.0: tmr: preinit running...
[ 4620.356066] nouveau 0000:01:00.0: tmr: preinit completed in 0us
[ 4620.356066] nouveau 0000:01:00.0: imem: preinit running...
[ 4620.356067] nouveau 0000:01:00.0: imem: preinit completed in 0us
[ 4620.356067] nouveau 0000:01:00.0: fb: preinit running...
[ 4620.356068] nouveau 0000:01:00.0: fb: preinit completed in 0us
[ 4620.356069] nouveau 0000:01:00.0: ltc: preinit running...
[ 4620.356069] nouveau 0000:01:00.0: ltc: preinit completed in 0us
[ 4620.356070] nouveau 0000:01:00.0: mmu: preinit running...
[ 4620.356070] nouveau 0000:01:00.0: mmu: preinit completed in 0us
[ 4620.356071] nouveau 0000:01:00.0: bar: preinit running...
[ 4620.356071] nouveau 0000:01:00.0: bar: preinit completed in 0us
[ 4620.356072] nouveau 0000:01:00.0: pmu: preinit running...
[ 4620.356072] nouveau 0000:01:00.0: pmu: preinit completed in 0us
[ 4620.356073] nouveau 0000:01:00.0: iccsense: preinit running...
[ 4620.356073] nouveau 0000:01:00.0: iccsense: preinit completed in 0us
[ 4620.356074] nouveau 0000:01:00.0: therm: preinit running...
[ 4620.356074] nouveau 0000:01:00.0: therm: preinit completed in 0us
[ 4620.356075] nouveau 0000:01:00.0: clk: preinit running...
[ 4620.356075] nouveau 0000:01:00.0: clk: preinit completed in 0us
[ 4620.356076] nouveau 0000:01:00.0: ce0: preinit running...
[ 4620.356077] nouveau 0000:01:00.0: ce0: preinit completed in 0us
[ 4620.356077] nouveau 0000:01:00.0: ce2: preinit running...
[ 4620.356078] nouveau 0000:01:00.0: ce2: preinit completed in 0us
[ 4620.356078] nouveau 0000:01:00.0: disp: preinit running...
[ 4620.356079] nouveau 0000:01:00.0: disp: preinit completed in 0us
[ 4620.356079] nouveau 0000:01:00.0: dma: preinit running...
[ 4620.356080] nouveau 0000:01:00.0: dma: preinit completed in 0us
[ 4620.356080] nouveau 0000:01:00.0: fifo: preinit running...
[ 4620.356081] nouveau 0000:01:00.0: fifo: preinit completed in 0us
[ 4620.356081] nouveau 0000:01:00.0: gr: preinit running...
[ 4620.356082] nouveau 0000:01:00.0: gr: preinit completed in 0us
[ 4620.356083] nouveau 0000:01:00.0: sw: preinit running...
[ 4620.356083] nouveau 0000:01:00.0: sw: preinit completed in 0us
[ 4620.356097] nouveau 0000:01:00.0: devinit: running init tables
[ 4620.356099] nouveau 0000:01:00.0: devinit: 0xf152[0]: unknown opcode 0x00
[ 4620.356109] nouveau 0000:01:00.0: preinit failed with -22
[ 4620.356109] nouveau: DRM:00000000:00000080: init failed with -22             
[ 4620.356110] nouveau: DRM:00000000:00000080: fini children...
[ 4620.356110] nouveau: DRM:00000000:00000080: fini running...
[ 4620.356111] nouveau: DRM:00000000:00000080: fini completed in 0us
[ 4620.356111] nouveau: DRM:00000000:00000080: destroy children...
[ 4620.356111] nouveau: DRM:00000000:00000080: destroy running...
[ 4620.356112] nouveau: DRM:00000000:00000080: destroy completed in 1us...
[ 4620.356112] nouveau: DRM:00000000:00000000: ioctl: return -22
[ 4620.356113] nouveau: DRM:00000000:00000000: fini notify
[ 4620.356114] nouveau: DRM:00000000:00000000: fini children...
[ 4620.356114] nouveau: DRM:00000000:00000000: fini running...
[ 4620.356115] nouveau: DRM:00000000:00000000: fini completed in 0us
[ 4620.356115] nouveau: DRM:00000000:00000000: destroy children...
[ 4620.356115] nouveau: DRM:00000000:00000000: destroy running...
[ 4620.356116] nouveau: DRM:00000000:00000000: destroy completed in 1us...
[ 4620.356264] nouveau 0000:01:00.0: sw: destroy running...
[ 4620.356265] nouveau 0000:01:00.0: sw: destroy completed in 1us
[ 4620.356267] nouveau 0000:01:00.0: gr: destroy running...
[ 4620.356268] nouveau 0000:01:00.0: gr: destroy completed in 0us
[ 4620.356269] nouveau 0000:01:00.0: fifo: destroy running...
[ 4620.356270] nouveau 0000:01:00.0: fifo: destroy completed in 1us
[ 4620.356271] nouveau 0000:01:00.0: dma: destroy running...
[ 4620.356272] nouveau 0000:01:00.0: dma: destroy completed in 0us
[ 4620.356273] nouveau 0000:01:00.0: disp: destroy running...
[ 4620.356274] nouveau 0000:01:00.0: disp: destroy completed in 1us
[ 4620.356275] nouveau 0000:01:00.0: ce2: destroy running...
[ 4620.356276] nouveau 0000:01:00.0: ce2: destroy completed in 0us
[ 4620.356277] nouveau 0000:01:00.0: ce0: destroy running...
[ 4620.356277] nouveau 0000:01:00.0: ce0: destroy completed in 0us
[ 4620.356278] nouveau 0000:01:00.0: clk: destroy running...
[ 4620.356279] nouveau 0000:01:00.0: clk: destroy completed in 0us
[ 4620.356280] nouveau 0000:01:00.0: therm: destroy running...
[ 4620.356281] nouveau 0000:01:00.0: therm: destroy completed in 0us
[ 4620.356282] nouveau 0000:01:00.0: iccsense: destroy running...
[ 4620.356283] nouveau 0000:01:00.0: iccsense: destroy completed in 0us
[ 4620.356284] nouveau 0000:01:00.0: pmu: destroy running...
[ 4620.356285] nouveau 0000:01:00.0: pmu: destroy completed in 0us
[ 4620.356285] nouveau 0000:01:00.0: bar: destroy running...
[ 4620.356286] nouveau 0000:01:00.0: bar: destroy completed in 0us
[ 4620.356287] nouveau 0000:01:00.0: mmu: destroy running...
[ 4620.356288] nouveau 0000:01:00.0: mmu: destroy completed in 0us
[ 4620.356289] nouveau 0000:01:00.0: ltc: destroy running...
[ 4620.356290] nouveau 0000:01:00.0: ltc: destroy completed in 1us
[ 4620.356291] nouveau 0000:01:00.0: fb: destroy running...
[ 4620.356293] nouveau 0000:01:00.0: fb: destroy completed in 2us
[ 4620.356294] nouveau 0000:01:00.0: imem: destroy running...
[ 4620.356295] nouveau 0000:01:00.0: imem: destroy completed in 0us
[ 4620.356295] nouveau 0000:01:00.0: tmr: destroy running...
[ 4620.356296] nouveau 0000:01:00.0: tmr: destroy completed in 0us
[ 4620.356297] nouveau 0000:01:00.0: bus: destroy running...
[ 4620.356298] nouveau 0000:01:00.0: bus: destroy completed in 0us
[ 4620.356299] nouveau 0000:01:00.0: mc: destroy running...
[ 4620.356299] nouveau 0000:01:00.0: mc: destroy completed in 0us
[ 4620.356300] nouveau 0000:01:00.0: mxm: destroy running...
[ 4620.356301] nouveau 0000:01:00.0: mxm: destroy completed in 0us
[ 4620.356302] nouveau 0000:01:00.0: fuse: destroy running...
[ 4620.356303] nouveau 0000:01:00.0: fuse: destroy completed in 0us
[ 4620.356304] nouveau 0000:01:00.0: i2c: destroy running...
[ 4620.356305] nouveau 0000:01:00.0: i2c: destroy completed in 0us
[ 4620.356305] nouveau 0000:01:00.0: gpio: destroy running...
[ 4620.356306] nouveau 0000:01:00.0: gpio: destroy completed in 0us
[ 4620.356307] nouveau 0000:01:00.0: priv: destroy running...
[ 4620.356308] nouveau 0000:01:00.0: priv: destroy completed in 0us
[ 4620.356309] nouveau 0000:01:00.0: top: destroy running...
[ 4620.356309] nouveau 0000:01:00.0: top: destroy completed in 0us
[ 4620.356310] nouveau 0000:01:00.0: devinit: destroy running...
[ 4620.356321] nouveau 0000:01:00.0: devinit: destroy completed in 9us
[ 4620.356322] nouveau 0000:01:00.0: bios: destroy running...
[ 4620.356323] nouveau 0000:01:00.0: bios: destroy completed in 1us
[ 4620.356324] nouveau 0000:01:00.0: pci: destroy running...
[ 4620.356332] nouveau 0000:01:00.0: pci: destroy completed in 7us
[ 4620.356480] nouveau: probe of 0000:01:00.0 failed with error -22

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--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Looks like we process your vbios incorrectly. Please attach an acpidump.

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--- Comment #2 from Sergey <sos at sokhapkin.dyndns.org> ---
Created attachment 127287
  --> https://bugs.freedesktop.org/attachment.cgi?id=127287&action=edit
acpidump output

acpidump attached

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--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Created attachment 127289
  --> https://bugs.freedesktop.org/attachment.cgi?id=127289&action=edit
_ROM method

Interesting, so it looks like

(a) the _ROM method only returns 0x1000 chunks at a time
(b) stores the VBIOS in 8 32K chunks (the chunks themselves do not appear to be
in the ACPI data dump)

I wonder if this is running up against our "fast" ACPI method reading
logic
again.

Can you try to edit drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c and
comment out (or remove) the line

"{ 0, &nvbios_acpi_fast },"

And see if that helps?

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--- Comment #4 from Sergey Okhapkin <sos at sokhapkin.dyndns.org> ---
The patch works:

[ 1175.989212] ACPI Warning: \_SB.PCI0.GFX0._DSM: Argument #4 type mismatch -
Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[ 1175.989299] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[ 1175.989407] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[ 1175.990458] pci 0000:01:00.0: optimus capabilities: enabled, status dynamic
power, 
[ 1175.990465] VGA switcheroo: detected Optimus DSM method \_SB_.PCI0.PEG0.PEGP
handle
[ 1175.990466] nouveau: detected PR support, will not use DSM
[ 1175.990559] nouveau 0000:01:00.0: NVIDIA GM107 (1171b0a2)
[ 1176.003295] nouveau 0000:01:00.0: bios: version 82.07.9b.00.69
[ 1176.004237] nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
[ 1176.666189] vga_switcheroo: enabled
[ 1176.666415] [TTM] Zone  kernel: Available graphics memory: 4032186 kiB
[ 1176.666435] [TTM] Zone   dma32: Available graphics memory: 2097152 kiB
[ 1176.666435] [TTM] Initializing pool allocator
[ 1176.666438] [TTM] Initializing DMA pool allocator
[ 1176.666444] nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
[ 1176.666445] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
[ 1176.666447] nouveau 0000:01:00.0: DRM: TMDS table version 2.0
[ 1176.666448] nouveau 0000:01:00.0: DRM: DCB version 4.0
[ 1176.666449] nouveau 0000:01:00.0: DRM: DCB outp 00: 08000f82 00020030
[ 1176.666450] nouveau 0000:01:00.0: DRM: DCB conn 00: 01000061
[ 1176.666474] nouveau 0000:01:00.0: DRM: BIOS FP mode: 1024x768 (65000kHz
pixel clock)
[ 1176.683565] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 1176.683566] [drm] Driver supports precise vblank timestamp query.
[ 1176.817465] nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
[ 1176.817469] [drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on
minor 1
[ 1182.560206] nouveau 0000:01:00.0: DRM: suspending console...
[ 1182.560207] nouveau 0000:01:00.0: DRM: suspending display...
[ 1182.560213] nouveau 0000:01:00.0: DRM: evicting buffers...
[ 1182.560214] nouveau 0000:01:00.0: DRM: waiting for kernel channels to go
idle...
[ 1182.560228] nouveau 0000:01:00.0: DRM: suspending client object trees...
[ 1182.563009] nouveau 0000:01:00.0: DRM: suspending kernel object tree...

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--- Comment #5 from Sergey Okhapkin <sos at sokhapkin.dyndns.org> ---
Xorg driver (xf86-video-nouveau-1.0.12) fails:

[  1596.906] (II) NOUVEAU driver
[  1596.906] (II) NOUVEAU driver for NVIDIA chipset families :
[  1596.906]    RIVA TNT        (NV04)
[  1596.906]    RIVA TNT2       (NV05)
[  1596.906]    GeForce 256     (NV10)
[  1596.906]    GeForce 2       (NV11, NV15)
[  1596.906]    GeForce 4MX     (NV17, NV18)
[  1596.906]    GeForce 3       (NV20)
[  1596.906]    GeForce 4Ti     (NV25, NV28)
[  1596.906]    GeForce FX      (NV3x)
[  1596.906]    GeForce 6       (NV4x)
[  1596.906]    GeForce 7       (G7x)
[  1596.906]    GeForce 8       (G8x)
[  1596.906]    GeForce GTX 200 (NVA0)
[  1596.906]    GeForce GTX 400 (NVC0)
[  1596.906] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[  1596.906] (++) using VT number 7

[  1596.907] (II) intel(0): Using Kernel Mode Setting driver: i915, version
1.6.0 20160711
[  1596.907] (II) [drm] nouveau interface version: 1.3.1
[  1596.907] (EE) Unknown chipset: NV117

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--- Comment #6 from Ilia Mirkin <imirkin at alum.mit.edu> ---
I'm looking over the fast logic and it seems like it should have worked.
This
debug patch should provide more info on what's going wrong. Mind reinstating
the line in shadowacpi.c and applying the below?


diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c
b/drivers/gpu/drm/nouveau/nouveau_acpi.c
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -423,7 +423,9 @@ bool nouveau_acpi_rom_supported(struct device *dev)

 int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len)
 {
-       return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset,
len);
+       int ret = nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset,
len);
+       printk(KERN_INFO "retrieving _ROM off: 0x%x, len: 0x%x, ret:
0x%x",
offset, len, ret);
+       return ret;
 }

 void *

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--- Comment #7 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Sergey Okhapkin from comment #5)
> Xorg driver (xf86-video-nouveau-1.0.12) fails:
> [  1596.907] (EE) Unknown chipset: NV117
That's expected. You can use the modesetting DDX if you have screens hanging
off the NVIDIA gpu. Otherwise I recommend enabling DRI3 and using that for
offloading.

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--- Comment #8 from Sergey Okhapkin <sos at sokhapkin.dyndns.org> ---
Should I uncomment in shadow.c first?

"{ 0, &nvbios_acpi_fast },"

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--- Comment #9 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Sergey Okhapkin from comment #8)
> Should I uncomment in shadow.c first?
> 
> "{ 0, &nvbios_acpi_fast },"
Please do, yes.

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--- Comment #10 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Ilia Mirkin from comment #6)
> I'm looking over the fast logic and it seems like it should have
worked.
> This debug patch should provide more info on what's going wrong. Mind
> reinstating the line in shadowacpi.c and applying the below?
> 
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c
> b/drivers/gpu/drm/nouveau/nouveau_acpi.c
> --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
> @@ -423,7 +423,9 @@ bool nouveau_acpi_rom_supported(struct device *dev)
>  
>  int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len)
>  {
> -       return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset,
> len);
> +       int ret = nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios,
> offset, len);
> +       printk(KERN_INFO "retrieving _ROM off: 0x%x, len: 0x%x, ret:
0x%x",
> offset, len, ret);
Er, that should probably have a \n at the end of the string. My bad.
> +       return ret;
>  }
>  
>  void *
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--- Comment #11 from Sergey Okhapkin <sos at sokhapkin.dyndns.org> ---
[ 3234.532656] ACPI Warning: \_SB.PCI0.GFX0._DSM: Argument #4 type mismatch -
Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[ 3234.532743] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[ 3234.532849] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[ 3234.533890] pci 0000:01:00.0: optimus capabilities: enabled, status dynamic
power, 
[ 3234.533897] VGA switcheroo: detected Optimus DSM method \_SB_.PCI0.PEG0.PEGP
handle
[ 3234.533898] nouveau: detected PR support, will not use DSM
[ 3234.534005] nouveau 0000:01:00.0: NVIDIA GM107 (1171b0a2)
[ 3234.538042] retrieving _ROM off: 0x0, len: 0x1000, ret: 0x1000
[ 3234.539278] retrieving _ROM off: 0x1000, len: 0xf000, ret: 0xf000
[ 3234.539616] retrieving _ROM off: 0x10000, len: 0x1000, ret: 0x1000
[ 3234.539953] retrieving _ROM off: 0x11000, len: 0xa000, ret: 0xa000
[ 3234.540028] nouveau 0000:01:00.0: bios: version 82.07.9b.00.69
[ 3234.540294] nouveau 0000:01:00.0: devinit: 0xf152[ ]: unknown opcode 0x00
[ 3234.540315] nouveau 0000:01:00.0: preinit failed with -22
[ 3234.540316] nouveau: DRM:00000000:00000080: init failed with -22
[ 3234.540472] nouveau: probe of 0000:01:00.0 failed with error -22

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--- Comment #12 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to Sergey Okhapkin from comment #11)
> [ 3234.532656] ACPI Warning: \_SB.PCI0.GFX0._DSM: Argument #4 type mismatch
> - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
> [ 3234.532743] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
> mismatch - Found [Buffer], ACPI requires [Package]
(20160422/nsarguments-95)
> [ 3234.532849] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
> mismatch - Found [Buffer], ACPI requires [Package]
(20160422/nsarguments-95)
> [ 3234.533890] pci 0000:01:00.0: optimus capabilities: enabled, status
> dynamic power, 
> [ 3234.533897] VGA switcheroo: detected Optimus DSM method
> \_SB_.PCI0.PEG0.PEGP handle
> [ 3234.533898] nouveau: detected PR support, will not use DSM
> [ 3234.534005] nouveau 0000:01:00.0: NVIDIA GM107 (1171b0a2)
> [ 3234.538042] retrieving _ROM off: 0x0, len: 0x1000, ret: 0x1000
> [ 3234.539278] retrieving _ROM off: 0x1000, len: 0xf000, ret: 0xf000
Grrr. Well, that's the issue. It only returns 0x1000 worth of data, but
claims
to return a buffer sized to 0xf000. And I think I see why:

            Name (VROM, Buffer (Local1)
            {
                 0x00                                             /* . */
            })

Which allocates the VROM buffer to be 0xf000 sized. At the end, that buffer is
filled with

            Mid (Local5, Local0, Local1, VROM) /*
\_SB_.PCI0.PEG0.PEGP._ROM.VROM */
            Return (VROM) /* \_SB_.PCI0.PEG0.PEGP._ROM.VROM */

However I suspect that Mid() doesn't actually *replace* the object. And this
is
what acpi_ex_store_buffer_to_buffer() does on Linux - as long as less data is
stored, the length of the object appears untouched.

So ... given this implementation, I'm not sure how we can reliably skip the
"fast" ACPI read. Ben, thoughts?

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--- Comment #13 from Ben Skeggs <skeggsb at gmail.com> ---
Give this (completely untested) patch a try:

https://github.com/skeggsb/nouveau/commit/0e7660d0dd8e4758f1da402fc24dd8d77c39d716

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--- Comment #14 from Sergey Okhapkin <sos at sokhapkin.dyndns.org> ---
Seems working.

[  637.158783] ACPI Warning: \_SB.PCI0.GFX0._DSM: Argument #4 type mismatch -
Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[  637.158870] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[  637.158978] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[  637.160088] pci 0000:01:00.0: optimus capabilities: enabled, status dynamic
power, 
[  637.160095] VGA switcheroo: detected Optimus DSM method \_SB_.PCI0.PEG0.PEGP
handle
[  637.160096] nouveau: detected PR support, will not use DSM
[  637.160955] nouveau 0000:01:00.0: NVIDIA GM107 (1171b0a2)
[  637.167300] retrieving _ROM off: 0x0, len: 0x1000, ret: 0x1000
[  637.167614] retrieving _ROM off: 0x1000, len: 0xf000, ret: 0xf000
[  637.167941] retrieving _ROM off: 0x0, len: 0x1000, ret: 0x1000
[  637.168326] retrieving _ROM off: 0x1000, len: 0x1000, ret: 0x1000
[  637.168643] retrieving _ROM off: 0x2000, len: 0x1000, ret: 0x1000
[  637.168948] retrieving _ROM off: 0x3000, len: 0x1000, ret: 0x1000
[  637.169330] retrieving _ROM off: 0x4000, len: 0x1000, ret: 0x1000
[  637.169647] retrieving _ROM off: 0x5000, len: 0x1000, ret: 0x1000
[  637.169949] retrieving _ROM off: 0x6000, len: 0x1000, ret: 0x1000
[  637.170388] retrieving _ROM off: 0x7000, len: 0x1000, ret: 0x1000
[  637.170691] retrieving _ROM off: 0x8000, len: 0x1000, ret: 0x1000
[  637.170993] retrieving _ROM off: 0x9000, len: 0x1000, ret: 0x1000
[  637.171398] retrieving _ROM off: 0xa000, len: 0x1000, ret: 0x1000
[  637.171734] retrieving _ROM off: 0xb000, len: 0x1000, ret: 0x1000
[  637.172065] retrieving _ROM off: 0xc000, len: 0x1000, ret: 0x1000
[  637.172461] retrieving _ROM off: 0xd000, len: 0x1000, ret: 0x1000
[  637.172789] retrieving _ROM off: 0xe000, len: 0x1000, ret: 0x1000
[  637.173106] retrieving _ROM off: 0xf000, len: 0x1000, ret: 0x1000
[  637.173559] retrieving _ROM off: 0x10000, len: 0x1000, ret: 0x1000
[  637.173900] retrieving _ROM off: 0x11000, len: 0x1000, ret: 0x1000
[  637.174403] retrieving _ROM off: 0x12000, len: 0x1000, ret: 0x1000
[  637.174739] retrieving _ROM off: 0x13000, len: 0x1000, ret: 0x1000
[  637.175070] retrieving _ROM off: 0x14000, len: 0x1000, ret: 0x1000
[  637.175514] retrieving _ROM off: 0x15000, len: 0x1000, ret: 0x1000
[  637.175841] retrieving _ROM off: 0x16000, len: 0x1000, ret: 0x1000
[  637.176169] retrieving _ROM off: 0x17000, len: 0x1000, ret: 0x1000
[  637.176580] retrieving _ROM off: 0x18000, len: 0x1000, ret: 0x1000
[  637.176908] retrieving _ROM off: 0x19000, len: 0x1000, ret: 0x1000
[  637.176921] retrieving _ROM off: 0x1a000, len: 0x1000, ret: 0x1000
[  637.177021] nouveau 0000:01:00.0: bios: version 82.07.9b.00.69
[  637.323115] nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
[  637.323120] nouveau 0000:01:00.0: priv: HUB0: 614900 00800000 (1c408200)
[  637.987352] vga_switcheroo: enabled
[  637.987641] [TTM] Zone  kernel: Available graphics memory: 4032186 kiB
[  637.987642] [TTM] Zone   dma32: Available graphics memory: 2097152 kiB
[  637.987643] [TTM] Initializing pool allocator
[  637.987647] [TTM] Initializing DMA pool allocator
[  637.987659] nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
[  637.987661] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
[  637.987664] nouveau 0000:01:00.0: DRM: TMDS table version 2.0
[  637.987666] nouveau 0000:01:00.0: DRM: DCB version 4.0
[  637.987668] nouveau 0000:01:00.0: DRM: DCB outp 00: 08000f82 00020030
[  637.987669] nouveau 0000:01:00.0: DRM: DCB conn 00: 01000061
[  637.987674] nouveau 0000:01:00.0: DRM: BIOS FP mode: 1024x768 (65000kHz
pixel clock)
[  638.016774] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[  638.016775] [drm] Driver supports precise vblank timestamp query.
[  638.196517] nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
[  638.196525] [drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on
minor 1

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Martin Peres <martin.peres at free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #15 from Martin Peres <martin.peres at free.fr> ---
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