I tried getting some more logs. I did the following in a bash:
[code]
export LIBGL_DEBUG=verbose
export MESA_DEBUG=1
export MESA_LOG_FILE=/home/tuxator/mesa_errs.log
steam /home/tuxator/steam_errs.log
[/code]
steam_errs.log has nothing of interest, but mesa_errs has these two errors:
[code]
Mesa
one of the recent updates changed the behaviour. I can now always see
the ingame screen and sometimes even move around for a few seconds. Also
some new stuff in dmesg.
After some research I was also able to enable sysrq again, so I did a
sysrq L. I also found a Troubleshooting site on the ubuntu
** Attachment added: output_dmesg.txt
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1438303/+attachment/4369710/+files/output_dmesg.txt
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** Attachment added: radeon_ring_gfx
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1438303/+attachment/4369713/+files/radeon_ring_gfx
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** Attachment added: regdump_good.txt
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1438303/+attachment/4369714/+files/regdump_good.txt
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** Attachment added: radeon_fence_info.txt
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1438303/+attachment/4369711/+files/radeon_fence_info.txt
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** Attachment added: output of sudo radeontool regmatch '*' after freeze and X
restart
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1438303/+attachment/4369715/+files/regdump_bad.txt
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I tried to get a backtrace via SSH, but no luck. I can start the gdb
session and attach to the Xorg process, but the moment the bug occurs
(screen freeze), I can't send any signals through my SSH session either.
A few times I had to do a hard-reset because Magic SysReq was not
recognized anymore
wrong package, sorry.
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https://bugs.launchpad.net/bugs/1438303
Title:
Radeon driver freezes GPU (reproducible)
To manage notifications about this bug go to:
Forgot the entire kern.log file, sorry. Relevant stuff starts at
521.412751
** Attachment added: kern.log
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1438303/+attachment/4361147/+files/kern.log
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Public bug reported:
Hi,
System:
lsb_release -rd
Description:Ubuntu Vivid Vervet (development branch)
Release:15.04
Package:
apt-cache policy xserver-xorg-video-radeon
xserver-xorg-video-radeon:
Installiert: 1:7.5.0-1ubuntu2
Installationskandidat: 1:7.5.0-1ubuntu2
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