Created attachment 96233 [details=
]
dmesg 3.12
I am seeing a GPU lockup from any v3.13 up to 3.14-rc7, which basically ren=
ders
my computer unusable under recent kernels :-(
[ 55.762710] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000=
msec
[ 55.762715] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000=
004
last fence id 0x000000000000000 on ring 5)
[ 55.762717] [drm:uvd_v1_0_ib_test] *ERROR* radeon: fence wait failed (-3=
5).
[ 55.762720] [drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB=
on
ring 5 (-35).
Hardware is an iMac 11,2 with a Radeon 4670 M96XT (RV730), 256MB GDDR3.=20
working up to 3.12, broken as of 3.13.
Xorg comes up after some dalays with a mostly black screen, some colored
rectangular artifacts where the login fields are, a working mouse cursor.
Console fb still works.
Bisected to this commit:
commit f9eaf9ae782d6480f179850e27e6f4911ac10227
Author: Christian K=C3=B6nig <christian.koenig@amd.com>
Date: Tue Oct 29 20:14:47 2013 +0100
drm/radeon: rework and fix reset detection v2
Stop fiddling with jiffies, always wait for RADEON_FENCE_JIFFIES_TIMEOU=
T.
Consolidate the two wait sequence implementations into just one functio=
n.
Activate all waiters and remember if the reset was already done instead=
of
trying to reset from only one thread.
v2: clear reset flag earlier to avoid timeout in IB test