Comment # 93
on bug 60879
from Łukasz Krzyżak
Hello I've got Radeon HD 7870 XT running under arch linux. It works fine on catalyst drivers, but fails on OS driver. Without patches from this bug (patch 3&4 or 5) my computer hangs. Signal to monitor is off and monitor suspends, logging through ssh is impossible, system logs are cut before launching X. After applying patch (3&4 or 5) screen goes black, but monitor doesn't go to suspend. I can log in with ssh, after killing Xorg.bin console is visible and operational. Aftr killing X kernel logs show 1868.387061] radeon 0000:01:00.0: ring 0 stalled for more than 395470msec [ 1868.387066] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000005 last fence id 0x0000000000000001 on ring 0) [ 1868.695731] [drm:si_dpm_set_power_state] *ERROR* si_disable_ulv failed Stack trace of running X shows it's waiting for some fence inside radeon dri. I'm attaching dmesg and xorg log after starting and killing X server with patch 5.
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