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
Ilia Mirkin
2017-Nov-17 17:41 UTC
[Nouveau] Blank console but X11 works on MCP79 - old regression since 3.8
On Fri, Nov 17, 2017 at 12:33 PM, Ondrej Zary <linux at rainbow-software.org> wrote:> @@ -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.OK, well that makes a *ton* of sense (8bpp being broken). I think the idea of bpp reduction is that when you're on your shiny new Riva TNT with 16MB of VRAM, you don't want to go crazy allocating all that to a pinned fbcon - almost half of that would go to a single 32bpp 1600x1200 buffer, more for 1920x1200. You want to be able to have at least a few fb-sized buffers for backbuffer rendering, etc. The specific limits could probably use tweaking - I think they only consider VRAM size, not the fb size. I guess 8bpp worked prior to the change you bisected though, so we should figure out what we did wrong in the new code. -ilia
Ondrej Zary
2017-Nov-17 19:25 UTC
[Nouveau] Blank console but X11 works on MCP79 - old regression since 3.8
On Friday 17 November 2017 18:41:17 Ilia Mirkin wrote:> On Fri, Nov 17, 2017 at 12:33 PM, Ondrej Zary > > <linux at rainbow-software.org> wrote: > > @@ -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. > > OK, well that makes a *ton* of sense (8bpp being broken). > > I think the idea of bpp reduction is that when you're on your shiny > new Riva TNT with 16MB of VRAM, you don't want to go crazy allocating > all that to a pinned fbcon - almost half of that would go to a single > 32bpp 1600x1200 buffer, more for 1920x1200. You want to be able to > have at least a few fb-sized buffers for backbuffer rendering, etc. > > The specific limits could probably use tweaking - I think they only > consider VRAM size, not the fb size. > > I guess 8bpp worked prior to the change you bisected though, so we > should figure out what we did wrong in the new code.Yes, booted 3.7 (last working kernel) and it's running in 8bpp. I guess that nv50_head_gamma_set() is missing something like this (from nv_crtc_gamma_set()): /* We need to know the depth before we upload, but it's possible to * get called before a framebuffer is bound. If this is the case, * mark the lut values as dirty by setting depth==0, and it'll be * uploaded on the first mode_set_base() */ if (!nv_crtc->base.primary->fb) { nv_crtc->lut.depth = 0; return 0; } That's easy to add but there's no mode_set_base() for nv50 so there's no place to add code like this: if (nv_crtc->lut.depth != drm_fb->format->depth) { nv_crtc->lut.depth = drm_fb->format->depth; nv_crtc_gamma_load(crtc); } -- Ondrej Zary
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