mesa: [regression] with Mesa 18.2.5-2 the charackter model in Tomb Raider is no longer rendered.

[Michael Biebl]

Control: reassign -1 src:mesa 18.2.5-2
Control: severity -1 important
Control: clone -1 -2
Control: reassign -2 gcc-8 8.2.0-9
Control: retitle -2 gcc-8 miscompiles mesa
Control: forwarded -2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87859
Control: tags -2 + patch
Control: affects -2 src:mesa

On Thu, 22 Nov 2018 02:32:35 +0100 GSR <***@infernal-iceberg.com>
wrote:> Package: mesa

Version: 18.2.5-2
Followup-For: Bug #914267
That looks like missing shaders. I hit a similar thing with mpv (just
blue window, sound but no video) after upgrading 18.2.5-1 => 18.2.5-2,
luckly showing some output that later helped with searches.
---8<---
[vo/gpu/opengl] 0:36(27): error: invalid input layout qualifier used
[vo/gpu/opengl]
[vo/gpu/opengl] shader link log (status=0): error: linking with

uncompiled/unspecialized shader

--->8---
Bug 914303 could be the same too, garbled or single color output could
mean shaders not working because they failed to compile. Looking up
the error text, I found the culprit could be gcc, creating faulty
mesa binaries. https://bugs.freedesktop.org/show_bug.cgi?id=108646
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87859

I ran into a similar issue.
I use vmware and hosts using 3D acceleration no longer start
successfully. On stdout I get the error message

NOT_IMPLEMENTED bora/mks/renderers/gl/GLShader.c:1887

I can confirm the findings of GSR that this appears to be a gcc-8
regression. Rebuilding src:mesa with gcc-7 fixed those issues for me.

Might be a good idea to (temporarily) switch to gcc-7 depending on how
long it takes until this fix is applied in gcc-8.
The attached patch worked for me.

Regards,
Michael

[Debian Bug Tracking System]

Post by Michael Biebl
reassign -1 src:mesa 18.2.5-2

Bug #914267 [mesa] mesa: [regression] with Mesa 18.2.5-2 the charackter model in Tomb Raider is no longer rendered.
Bug reassigned from package 'mesa' to 'src:mesa'.
No longer marked as found in versions 18.2.5-2.
Ignoring request to alter fixed versions of bug #914267 to the same values previously set
Bug #914267 [src:mesa] mesa: [regression] with Mesa 18.2.5-2 the charackter model in Tomb Raider is no longer rendered.
Marked as found in versions mesa/18.2.5-2.

Post by Michael Biebl
severity -1 important

Bug #914267 [src:mesa] mesa: [regression] with Mesa 18.2.5-2 the charackter model in Tomb Raider is no longer rendered.
Severity set to 'important' from 'normal'

Post by Michael Biebl
clone -1 -2

Bug #914267 [src:mesa] mesa: [regression] with Mesa 18.2.5-2 the charackter model in Tomb Raider is no longer rendered.
Bug 914267 cloned as bug 914316

Post by Michael Biebl
reassign -2 gcc-8 8.2.0-9

Bug #914316 [src:mesa] mesa: [regression] with Mesa 18.2.5-2 the charackter model in Tomb Raider is no longer rendered.
Bug reassigned from package 'src:mesa' to 'gcc-8'.
No longer marked as found in versions mesa/18.2.5-2.
Ignoring request to alter fixed versions of bug #914316 to the same values previously set
Bug #914316 [gcc-8] mesa: [regression] with Mesa 18.2.5-2 the charackter model in Tomb Raider is no longer rendered.
Marked as found in versions gcc-8/8.2.0-9.

Post by Michael Biebl
retitle -2 gcc-8 miscompiles mesa

Bug #914316 [gcc-8] mesa: [regression] with Mesa 18.2.5-2 the charackter model in Tomb Raider is no longer rendered.
Changed Bug title to 'gcc-8 miscompiles mesa' from 'mesa: [regression] with Mesa 18.2.5-2 the charackter model in Tomb Raider is no longer rendered.'.

Post by Michael Biebl
forwarded -2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87859

Bug #914316 [gcc-8] gcc-8 miscompiles mesa
Set Bug forwarded-to-address to 'https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87859'.

Post by Michael Biebl
tags -2 + patch

Bug #914316 [gcc-8] gcc-8 miscompiles mesa
Added tag(s) patch.

Post by Michael Biebl
affects -2 src:mesa

Bug #914316 [gcc-8] gcc-8 miscompiles mesa
Added indication that 914316 affects src:mesa