Ondrej Zary
2017-Nov-17 14:26 UTC
[Nouveau] Blank console but X11 works on MCP79 - old regression since 3.8
Hello,
I've just been hit by this old bug which is still present in 4.14:
https://bugs.freedesktop.org/show_bug.cgi?id=80675
On MCP79 (ION), when stolen memory is set to 32MB in BIOS, console is blank
but X11 works. When the stolen memory is increased to 64MB, console works
fine.
Bisected it to this:
4f6029da58ba9204c98e33f4f3737fe085c87a6f is the first bad commit
commit 4f6029da58ba9204c98e33f4f3737fe085c87a6f
Author: Ben Skeggs <bskeggs at redhat.com>
Date: Fri Nov 16 11:54:31 2012 +1000
drm/nv50-nvc0: switch to common disp impl, removing previous version
Signed-off-by: Ben Skeggs <bskeggs at redhat.com>
It's a big change so I'm not able to do more debugging.
--
Ondrej Zary
Ilia Mirkin
2017-Nov-17 14:43 UTC
[Nouveau] Blank console but X11 works on MCP79 - old regression since 3.8
With a new kernel, mind grabbing a dmesg with drm.debug=0x1e nouveau.debug=debug (or maybe even =trace)? Maybe also see if fbcon/fbdev have any debug things that can be turned on? Sounds like things are generally working, just the fbcon -> nouveaufb path seems somehow buggered. Another thing to try would be nouveau.atomic=1 On Fri, Nov 17, 2017 at 9:26 AM, Ondrej Zary <linux at rainbow-software.org> wrote:> Hello, > I've just been hit by this old bug which is still present in 4.14: > https://bugs.freedesktop.org/show_bug.cgi?id=80675 > > On MCP79 (ION), when stolen memory is set to 32MB in BIOS, console is blank > but X11 works. When the stolen memory is increased to 64MB, console works > fine. > > Bisected it to this: > > 4f6029da58ba9204c98e33f4f3737fe085c87a6f is the first bad commit > commit 4f6029da58ba9204c98e33f4f3737fe085c87a6f > Author: Ben Skeggs <bskeggs at redhat.com> > Date: Fri Nov 16 11:54:31 2012 +1000 > > drm/nv50-nvc0: switch to common disp impl, removing previous version > > Signed-off-by: Ben Skeggs <bskeggs at redhat.com> > > It's a big change so I'm not able to do more debugging. > > -- > Ondrej Zary
Ondrej Zary
2017-Nov-17 17:33 UTC
[Nouveau] Blank console but X11 works on MCP79 - old regression since 3.8
On Friday 17 November 2017 15:43:33 Ilia Mirkin wrote:> With a new kernel, mind grabbing a dmesg with drm.debug=0x1e > nouveau.debug=debug (or maybe even =trace)? Maybe also see if > fbcon/fbdev have any debug things that can be turned on?Here's diff of the 32MB and 64MB debug logs: --- nouveau-debug-32mb.txt- 2017-11-17 18:12:06.290108330 +0100 +++ nouveau-debug-64mb.txt- 2017-11-17 18:12:31.709696096 +0100 @@ -81,9 +81,9 @@ nouveau 0000:02:00.0: tmr: numerator : 0000000c nouveau 0000:02:00.0: tmr: denominator : 00000005 nouveau 0000:02:00.0: tmr: timer frequency : 31250Hz -nouveau 0000:02:00.0: tmr: time low : 6335d09e +nouveau 0000:02:00.0: tmr: time low : 7bb102a6 nouveau 0000:02:00.0: tmr: time high : 00000003 -nouveau 0000:02:00.0: fb: 32 MiB stolen system memory +nouveau 0000:02:00.0: fb: 64 MiB stolen system memory nouveau 0000:02:00.0: fb: 0 compression tags nouveau 0000:02:00.0: volt: current voltage unknown nouveau 0000:02:00.0: i2c: bus 0002: probing monitoring devices @@ -103,11 +103,11 @@ nouveau 0000:02:00.0: clk: 1b: 450000 KHz nouveau 0000:02:00.0: clk: --: core 450 MHz shader 1100 MHz vdec 450 MHz nouveau: DRM:00000000:00000080: init children... -nouveau: DRM:00000000:00000080: init completed in 71380us -[TTM] Zone kernel: Available graphics memory: 444902 kiB -[TTM] Zone highmem: Available graphics memory: 497930 kiB +nouveau: DRM:00000000:00000080: init completed in 71260us +[TTM] Zone kernel: Available graphics memory: 445198 kiB +[TTM] Zone highmem: Available graphics memory: 481842 kiB [TTM] Initializing pool allocator -nouveau 0000:02:00.0: DRM: VRAM: 32 MiB +nouveau 0000:02:00.0: DRM: VRAM: 64 MiB nouveau 0000:02:00.0: DRM: GART: 1048576 MiB nouveau 0000:02:00.0: DRM: TMDS table version 2.0 nouveau 0000:02:00.0: DRM: DCB version 4.0 @@ -126,22 +126,22 @@ nouveau: DRM:00000000:0000887d: init completed in 96us nouveau: DRM:00000000:00000002: fini children... nouveau: DRM:00000000:00000002: fini running... -nouveau: DRM:00000000:00000002: fini completed in 66us +nouveau: DRM:00000000:00000002: fini completed in 64us nouveau: DRM:00000000:00000002: destroy children... nouveau: DRM:00000000:00000002: destroy running... -nouveau: DRM:00000000:00000002: destroy completed in 69us... +nouveau: DRM:00000000:00000002: destroy completed in 68us... nouveau: DRM:f0000000:0000003d: init running... nouveau: DRM:f0000000:0000003d: init children... -nouveau: DRM:f0000000:0000003d: init completed in 64us +nouveau: DRM:f0000000:0000003d: init completed in 66us nouveau: DRM:f0000001:0000003d: init running... nouveau: DRM:f0000001:0000003d: init children... -nouveau: DRM:f0000001:0000003d: init completed in 68us +nouveau: DRM:f0000001:0000003d: init completed in 66us nouveau: DRM:00000000:0000827a: init running... nouveau: DRM:00000000:0000827a: init children... -nouveau: DRM:00000000:0000827a: init completed in 67us +nouveau: DRM:00000000:0000827a: init completed in 73us nouveau: DRM:00000000:00000002: init running... nouveau: DRM:00000000:00000002: init children... -nouveau: DRM:00000000:00000002: init completed in 66us +nouveau: DRM:00000000:00000002: init completed in 68us nouveau: DRM:00000000:0000837c: init running... nouveau: DRM:00000000:0000837c: init children... nouveau: DRM:00000000:0000837c: init completed in 71us @@ -150,16 +150,16 @@ nouveau: DRM:00000000:00000002: fini completed in 66us nouveau: DRM:00000000:00000002: destroy children... nouveau: DRM:00000000:00000002: destroy running... -nouveau: DRM:00000000:00000002: destroy completed in 66us... +nouveau: DRM:00000000:00000002: destroy completed in 85us... nouveau: DRM:f0000000:0000003d: init running... nouveau: DRM:f0000000:0000003d: init children... -nouveau: DRM:f0000000:0000003d: init completed in 66us +nouveau: DRM:f0000000:0000003d: init completed in 65us nouveau: DRM:f0000001:0000003d: init running... nouveau: DRM:f0000001:0000003d: init children... nouveau: DRM:f0000001:0000003d: init completed in 66us nouveau: DRM:00000000:0000827b: init running... nouveau: DRM:00000000:0000827b: init children... -nouveau: DRM:00000000:0000827b: init completed in 69us +nouveau: DRM:00000000:0000827b: init completed in 71us nouveau: DRM:00000000:00000002: init running... nouveau: DRM:00000000:00000002: init children... nouveau: DRM:00000000:00000002: init completed in 66us @@ -174,43 +174,43 @@ nouveau: DRM:00000000:00000002: destroy completed in 66us... nouveau: DRM:f0000000:0000003d: init running... nouveau: DRM:f0000000:0000003d: init children... -nouveau: DRM:f0000000:0000003d: init completed in 64us +nouveau: DRM:f0000000:0000003d: init completed in 66us nouveau: DRM:f0000001:0000003d: init running... nouveau: DRM:f0000001:0000003d: init children... nouveau: DRM:f0000001:0000003d: init completed in 66us nouveau: DRM:00000000:0000827a: init running... nouveau: DRM:00000000:0000827a: init children... -nouveau: DRM:00000000:0000827a: init completed in 71us +nouveau: DRM:00000000:0000827a: init completed in 72us nouveau: DRM:00000000:00000002: init running... nouveau: DRM:00000000:00000002: init children... -nouveau: DRM:00000000:00000002: init completed in 65us +nouveau: DRM:00000000:00000002: init completed in 66us nouveau: DRM:00000000:0000837c: init running... nouveau: DRM:00000000:0000837c: init children... -nouveau: DRM:00000000:0000837c: init completed in 71us +nouveau: DRM:00000000:0000837c: init completed in 72us nouveau: DRM:00000000:00000002: fini children... nouveau: DRM:00000000:00000002: fini running... -nouveau: DRM:00000000:00000002: fini completed in 81us +nouveau: DRM:00000000:00000002: fini completed in 66us nouveau: DRM:00000000:00000002: destroy children... nouveau: DRM:00000000:00000002: destroy running... -nouveau: DRM:00000000:00000002: destroy completed in 67us... +nouveau: DRM:00000000:00000002: destroy completed in 66us... nouveau: DRM:f0000000:0000003d: init running... nouveau: DRM:f0000000:0000003d: init children... -nouveau: DRM:f0000000:0000003d: init completed in 63us +nouveau: DRM:f0000000:0000003d: init completed in 66us nouveau: DRM:f0000001:0000003d: init running... nouveau: DRM:f0000001:0000003d: init children... -nouveau: DRM:f0000001:0000003d: init completed in 66us +nouveau: DRM:f0000001:0000003d: init completed in 75us nouveau: DRM:00000000:0000827b: init running... nouveau: DRM:00000000:0000827b: init children... -nouveau: DRM:00000000:0000827b: init completed in 159us +nouveau: DRM:00000000:0000827b: init completed in 72us nouveau: DRM:00000000:00000002: init running... nouveau: DRM:00000000:00000002: init children... -nouveau: DRM:00000000:00000002: init completed in 65us +nouveau: DRM:00000000:00000002: init completed in 66us nouveau: DRM:00000000:0000837e: init running... nouveau: DRM:00000000:0000837e: init children... -nouveau: DRM:00000000:0000837e: init completed in 70us +nouveau: DRM:00000000:0000837e: init completed in 71us nouveau: DRM:00000000:00000002: fini children... nouveau: DRM:00000000:00000002: fini running... -nouveau: DRM:00000000:00000002: fini completed in 66us +nouveau: DRM:00000000:00000002: fini completed in 65us nouveau: DRM:00000000:00000002: destroy children... nouveau: DRM:00000000:00000002: destroy running... nouveau: DRM:00000000:00000002: destroy completed in 66us... @@ -224,34 +224,34 @@ [drm] Driver supports precise vblank timestamp query. nouveau: DRM:00000000:ffffffff: init running... nouveau: DRM:00000000:ffffffff: init children... -nouveau: DRM:00000000:ffffffff: init completed in 77us +nouveau: DRM:00000000:ffffffff: init completed in 76us nouveau: DRM:00000000:00000002: init running... nouveau: DRM:00000000:00000002: init children... -nouveau: DRM:00000000:00000002: init completed in 67us +nouveau: DRM:00000000:00000002: init completed in 66us nouveau: DRM:00000000:0000826f: init running... nouveau: DRM:00000000:0000826f: init children... -nouveau: DRM:00000000:0000826f: init completed in 171us +nouveau: DRM:00000000:0000826f: init completed in 173us nouveau: DRM:80000002:0000003d: init running... nouveau: DRM:80000002:0000003d: init children... -nouveau: DRM:80000002:0000003d: init completed in 66us +nouveau: DRM:80000002:0000003d: init completed in 67us nouveau: DRM:80000003:0000003d: init running... nouveau: DRM:80000003:0000003d: init children... -nouveau: DRM:80000003:0000003d: init completed in 68us +nouveau: DRM:80000003:0000003d: init completed in 64us nouveau: DRM:55550000:fffffffa: init running... nouveau: DRM:00000000:00000000: init running... nouveau: DRM:00000000:00000000: init children... -nouveau: DRM:00000000:00000000: init completed in 66us +nouveau: DRM:00000000:00000000: init completed in 65us nouveau: DRM:55550000:fffffffa: init children... -nouveau: DRM:55550000:fffffffa: init completed in 262us +nouveau: DRM:55550000:fffffffa: init completed in 263us nouveau: DRM:80000006:0000003d: init running... nouveau: DRM:80000006:0000003d: init children... -nouveau: DRM:80000006:0000003d: init completed in 65us +nouveau: DRM:80000006:0000003d: init completed in 66us nouveau: DRM:00005039:00005039: init running... nouveau: DRM:00000000:00000000: init running... nouveau: DRM:00000000:00000000: init children... nouveau: DRM:00000000:00000000: init completed in 66us nouveau: DRM:00005039:00005039: init children... -nouveau: DRM:00005039:00005039: init completed in 268us +nouveau: DRM:00005039:00005039: init completed in 274us nouveau 0000:02:00.0: DRM: MM: using M2MF for buffer copies nouveau 0000:02:00.0: disp: supervisor 00000010 000002a0 nouveau 0000:02:00.0: disp: Core: @@ -405,7 +405,7 @@ [drm:drm_setup_crtcs [drm_kms_helper]] desired mode 1280x1024 set on crtc 34 (0,0) nouveau: DRM:ffff0000:0000003d: init running... nouveau: DRM:ffff0000:0000003d: init children... -nouveau: DRM:ffff0000:0000003d: init completed in 71us +nouveau: DRM:ffff0000:0000003d: init completed in 68us nouveau: DRM:ffff0000:0000003d: init running... nouveau: DRM:ffff0000:0000003d: init children... nouveau: DRM:ffff0000:0000003d: init completed in 67us @@ -415,7 +415,7 @@ nouveau: DRM:0000502d:0000502d: init running... nouveau: DRM:0000502d:0000502d: init children... nouveau: DRM:0000502d:0000502d: init completed in 67us -nouveau 0000:02:00.0: DRM: allocated 1280x1024 fb: 0x50000, bo f667ac00 +nouveau 0000:02:00.0: DRM: allocated 1280x1024 fb: 0x50000, bo f6afa000 fbcon: nouveaufb (fb0) is primary device [drm:drm_crtc_helper_set_config [drm_kms_helper]] [drm:drm_crtc_helper_set_config [drm_kms_helper]] [CRTC:34:crtc-0] [FB:61] #connectors=1 (x y) (0 0) @@ -483,8 +483,8 @@ nouveau 0000:02:00.0: disp: 0860: 00000000 -> 00000500 nouveau 0000:02:00.0: disp: 0864: 00000000 nouveau 0000:02:00.0: disp: 0868: 00000000 -> 04000500 -nouveau 0000:02:00.0: disp: 086c: 00000000 -> 00100500 -nouveau 0000:02:00.0: disp: 0870: 0000e900 -> 00001e00 +nouveau 0000:02:00.0: disp: 086c: 00000000 -> 00100a00 +nouveau 0000:02:00.0: disp: 0870: 0000e900 -> 0000e800 nouveau 0000:02:00.0: disp: 0874: 00000000 -> ffff0000 nouveau 0000:02:00.0: disp: 0878: 00000000 nouveau 0000:02:00.0: disp: 0880: 05000000 Looks like it's using 8bpp (0x1e00) in 32MB case but 16bpp (0xe800) in 64MB case. Why? I get blank screen even with 64MB with video=1280x1024-8 kernel parameter. Console works with video=1280x1024-16 even with 32MB stolen memory. Conclusions: 8-bit support is broken and bpp reduction is weird.> Sounds like things are generally working, just the fbcon -> nouveaufb > path seems somehow buggered. > > Another thing to try would be nouveau.atomic=1 > > On Fri, Nov 17, 2017 at 9:26 AM, Ondrej Zary <linux at rainbow-software.org> wrote: > > Hello, > > I've just been hit by this old bug which is still present in 4.14: > > https://bugs.freedesktop.org/show_bug.cgi?id=80675 > > > > On MCP79 (ION), when stolen memory is set to 32MB in BIOS, console is > > blank but X11 works. When the stolen memory is increased to 64MB, console > > works fine. > > > > Bisected it to this: > > > > 4f6029da58ba9204c98e33f4f3737fe085c87a6f is the first bad commit > > commit 4f6029da58ba9204c98e33f4f3737fe085c87a6f > > Author: Ben Skeggs <bskeggs at redhat.com> > > Date: Fri Nov 16 11:54:31 2012 +1000 > > > > drm/nv50-nvc0: switch to common disp impl, removing previous version > > > > Signed-off-by: Ben Skeggs <bskeggs at redhat.com> > > > > It's a big change so I'm not able to do more debugging. > > > > -- > > Ondrej Zary-- Ondrej Zary
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