<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - Hangs on Cayman (HD6950) when watching flash/using vdpau" href="https://bugs.freedesktop.org/show_bug.cgi?id=64867#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - Hangs on Cayman (HD6950) when watching flash/using vdpau" href="https://bugs.freedesktop.org/show_bug.cgi?id=64867">bug 64867</a> from <a class="email" href="mailto:h.judt@gmx.at" title="Harald Judt <h.judt@gmx.at>"> Harald Judt</a> <pre>Hoping that it would be a workaround, I've applied the following patch from another bug report: diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c index 5407459..959e7cf 100644 --- a/drivers/gpu/drm/radeon/radeon_cs.c +++ b/drivers/gpu/drm/radeon/radeon_cs.c @@ -477,6 +477,7 @@ static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev, if (r) { goto out; } + radeon_fence_wait(vm->fence, false); radeon_cs_sync_rings(parser); radeon_cs_sync_to(parser, vm->fence); radeon_cs_sync_to(parser, radeon_vm_grab_id(rdev, vm, parser->ring)); While the hang happened again while playing a flash video (I'll try if I can reproduce it somehow), this time I was able to vt switch, and X was killed and the following additional lines got appended to dmesg: [30243.510949] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec [30243.510951] radeon 0000:01:00.0: GPU lockup (waiting for 0x00000000005c90bd last fence id 0x00000000005c90b8) [30243.510952] radeon 0000:01:00.0: couldn't schedule ib [30243.510973] radeon 0000:01:00.0: Trying to sync to a disabled ring! [30243.511047] radeon 0000:01:00.0: couldn't schedule ib [30243.511048] [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB ! [30243.511197] radeon 0000:01:00.0: couldn't schedule ib [30243.511198] [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB ! [30243.512323] radeon 0000:01:00.0: couldn't schedule ib [30243.512324] [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB ! [30243.512851] radeon 0000:01:00.0: couldn't schedule ib [30243.512852] [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB ! [30254.004957] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec [30254.004959] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000334 last fence id 0x0000000000000333) [30254.004961] radeon 0000:01:00.0: couldn't schedule ib [30254.005052] radeon 0000:01:00.0: couldn't schedule ib [30254.005064] radeon 0000:01:00.0: couldn't schedule ib [30254.005070] radeon 0000:01:00.0: couldn't schedule ib [30254.005084] radeon 0000:01:00.0: couldn't schedule ib [30254.005092] radeon 0000:01:00.0: couldn't schedule ib [30254.005097] radeon 0000:01:00.0: Trying to sync to a disabled ring! [...] [30243.510949] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec [30243.510951] radeon 0000:01:00.0: GPU lockup (waiting for 0x00000000005c90bd last fence id 0x00000000005c90b8) [30243.510952] radeon 0000:01:00.0: couldn't schedule ib [30243.510973] radeon 0000:01:00.0: Trying to sync to a disabled ring! [30243.511047] radeon 0000:01:00.0: couldn't schedule ib [30243.511048] [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB ! [30243.511197] radeon 0000:01:00.0: couldn't schedule ib [30243.511198] [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB ! [30243.512323] radeon 0000:01:00.0: couldn't schedule ib [30243.512324] [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB ! [30243.512851] radeon 0000:01:00.0: couldn't schedule ib [30243.512852] [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB ! [30254.004957] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec [30254.004959] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000334 last fence id 0x0000000000000333) [30254.004961] radeon 0000:01:00.0: couldn't schedule ib [30254.005052] radeon 0000:01:00.0: couldn't schedule ib [30254.005064] radeon 0000:01:00.0: couldn't schedule ib [30254.005070] radeon 0000:01:00.0: couldn't schedule ib [30254.005084] radeon 0000:01:00.0: couldn't schedule ib [30254.005092] radeon 0000:01:00.0: couldn't schedule ib [30254.005097] radeon 0000:01:00.0: Trying to sync to a disabled ring! [30254.012901] [drm:radeon_cs_ib_chunk] *ERROR* Failed to schedule IB ! [...] many similar repeated lines about IB [...] [30264.498754] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec [30264.498759] radeon 0000:01:00.0: GPU lockup (waiting for 0x00000000000090e5 last fence id 0x00000000000090e3) Trying to restart X didn't work (X crashed), so I had to reboot the machine. Not sure if this brings any relevations. Anything I could do to provide more information next time when this happens?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>