Bug 111110

Hello,

with the last Mesa from OpenSUSE factory this regression is still present
# rpm -qa Mesa*
Mesa-32bit-19.1.2-225.1.x86_64
Mesa-dri-19.1.2-225.1.x86_64
Mesa-libglapi0-19.1.2-225.1.x86_64
Mesa-demo-x-8.4.0-1.7.x86_64
Mesa-libGLESv2-2-19.1.2-225.1.x86_64
Mesa-libEGL1-19.1.2-225.1.x86_64
Mesa-dri-nouveau-19.1.2-225.1.x86_64
Mesa-libGL1-19.1.2-225.1.x86_64
Mesa-libva-19.1.2-225.1.x86_64
Mesa-libGL1-32bit-19.1.2-225.1.x86_64
Mesa-19.1.2-225.1.x86_64
Mesa-libglapi0-32bit-19.1.2-225.1.x86_64
Mesa-gallium-32bit-19.1.2-225.1.x86_64
Mesa-dri-32bit-19.1.2-225.1.x86_64
Mesa-gallium-19.1.2-225.1.x86_64
Mesa-KHR-devel-19.1.2-225.1.x86_64
Mesa-libEGL-devel-19.1.2-225.1.x86_64
Mesa-libGL-devel-19.1.2-225.1.x86_64
Mesa-libEGL1-32bit-19.1.2-225.1.x86_64

# rpm -qa xf86-video-nouveau
xf86-video-nouveau-1.0.15-40.12.x86_64

# uname -a
Linux hpprol2 5.2.1-1-default #1 SMP Mon Jul 15 05:32:47 UTC 2019 (bf5c01b) x86_64 x86_64 x86_64 GNU/Linux

the same error is present in journalctl.
Jul 25 08:29:02 hpprol2 kernel: nouveau 0000:0a:00.0: disp: outp 03:0006:0f42: training failed

Not sure if Mesa is involved or alone nouveau?

Regards

Created attachment 145022 [details]
Xorg.0.log

Hello I tested with the last available kernel
"Linux hpprol2 5.3.0-rc3-4.g7de292a-default #1 SMP Fri Aug 9 16:17:27 UTC 2019 (7de292a) x86_64 x86_64 x86_64 GNU/Linux
"

This regression is still present.

I have attached the Xorg.0.log. Do you need other information?

Many thanks in advance
Philippe

Created attachment 145027 [details]
journalctl with debug

hello,

I added the parameters "drm.debug=14  log_buf_len=16M" on the boot option
here the output of journalctl -b 0

Created attachment 145028 [details]
dmesg output with debug

hello,

I added the parameters "drm.debug=14  log_buf_len=16M" on the boot option
here the output of dmesg

What was a working kernel, and what's a non-working kernel?

The most effective way to determine the problematic change is to do a git bisect between those two kernels.

Created attachment 145029 [details]
Xorg.0.log with debug

hello,

I added the parameters "drm.debug=14  log_buf_len=16M" on the boot option
here the Xorg.0.log

(In reply to Ilia Mirkin from comment #6)
> What was a working kernel, and what's a non-working kernel?
> 
> The most effective way to determine the problematic change is to do a git
> bisect between those two kernels.

I think that it is not the kernel because when I saw the problem I rebooted the preceding kernel and the problem was then also present.
On july, 10 I installed.a snapshot with a lot of component. looking in the zypper log in see that the kernel:
Old = 5.1.15-1.1
New = 5.1.16-1.2

libdrm-nouveau2 
Old: 2.4.98-1.3 (installed on 2019-06-17) ==> no probelm
New: 2.4.99-1.1  ==> problem is present 

I never did a bisect. I'll try to find some info about this but no sure if I can do it.

Regards
Philippe

Perhaps I don't quite understand the issue then, but display modesets are controlled by the kernel. The error you're seeing is with link training. So it seems likely that a kernel update is responsible.

Could also be a userspace update which makes use of the kernel differently, triggering a pre-existing bug. libdrm_nouveau/mesa and such are not at all involved in this though -- that's just for 2d/3d accelerated rendering.

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