From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 104306] Mesa 17.3 breaks Firefox and other Xwayland apps on AMD
HD7750
Date: Tue, 09 Jan 2018 00:50:11 +0000
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Date: Tue, 9 Jan 2018 00:50:11 +0000
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https://bugs.freedesktop.org/show_bug.cgi?id=3D104306
--- Comment #12 from eric vz ---
Subsequent bisects (starting at different ranges so different commits would=
be
tested) have led me to the same place. No idea why I thought 255573996 work=
ed
for a while; all new builds from it break for me. I have Pacman packages f=
or
every build I've made if anyone would find them useful.
I narrowed the problem to the final return statement by replacing it with
"return true;" which resulted in a working build. I also tried to rule out
side-effects from the call by adding "bind =3D
screen->check_resource_capability(screen, image->texture, bind) ? 1 : 0;"
before the return true so the method would be called but its return value
ignored, assuming the compiler is not smart enough to optimize that out. T=
hat
build worked too.=20
I assume that capability check must sometimes be returning false in some
unexpected situations, and something is not handling that. I tried making a
debug build of mesa-demos, then gdb glxinfo and set a breakpoint on
dri2_validate_usage, but that method appears not to be called before the
process hangs. I assume something during system startup calls it, caches t=
he
result, and leads to these issues downstream?
If anyone has any guidance on next steps, I'd appreciate it.
--=20
You are receiving this mail because:
You are the assignee for the bug.=
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Date: Tue, 9 Jan 2018 00:50:11 +0000
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X-Bugzilla-URL: http://bugs.freedesktop.org/
Auto-Submitted: auto-generated
Comme=
nt # 12
on bug 10430=
6
from eric vz
Subsequent bisects (starting at different ranges so different =
commits would be
tested) have led me to the same place. No idea why I thought 255573996 work=
ed
for a while; all new builds from it break for me. I have Pacman packages f=
or
every build I've made if anyone would find them useful.
I narrowed the problem to the final return statement by replacing it with
"return true;" which resulted in a working build. I also tried t=
o rule out
side-effects from the call by adding "bind =3D
screen->check_resource_capability(screen, image->texture, bind) ? 1 :=
0;"
before the return true so the method would be called but its return value
ignored, assuming the compiler is not smart enough to optimize that out. T=
hat
build worked too.=20
I assume that capability check must sometimes be returning false in some
unexpected situations, and something is not handling that. I tried making a
debug build of mesa-demos, then gdb glxinfo and set a breakpoint on
dri2_validate_usage, but that method appears not to be called before the
process hangs. I assume something during system startup calls it, caches t=
he
result, and leads to these issues downstream?
If anyone has any guidance on next steps, I'd appreciate it.
You are receiving this mail because:
- You are the assignee for the bug.
=
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