https://bugzilla.kernel.org/show_bug.cgi?id=204181 --- Comment #34 from Sergey Kondakov (virtuousfox@xxxxxxxxx) --- (In reply to Nicholas Kazlauskas from comment #33) > I(In reply to Sergey Kondakov from comment #26) > > Created attachment 284083 [details] > > dmesg_2019-08-02-amdgpu_fail_on_patched_5.2.5 > > > > (In reply to Nicholas Kazlauskas from comment #24) > > > This should be fixed with the series linked below: > > > > > > https://patchwork.freedesktop.org/series/64505/ > > > > > > But it still needs review and backporting to older kernels. > > > > Celebration might have been premature. Hours later I've got another freeze > > with different error in amdgpu. Only this time, mouse cursor was movable > > over frozen frame right until I tried switching VT. Here's trace: > > BUG: unable to handle page fault for address: 0000000800000184 > > #PF: supervisor read access in kernel mode > > #PF: error_code(0x0000) - not-present page > > PGD 0 P4D 0 > > Oops: 0000 [#1] PREEMPT SMP NOPTI > > CPU: 2 PID: 21044 Comm: kworker/u16:0 Tainted: G W IO > > 5.2.5-1396.g79b6a9c-HSF #1 openSUSE Tumbleweed (unreleased) > > Hardware name: Gigabyte Technology Co., Ltd. GA-990XA-UD3/GA-990XA-UD3, > BIOS > > F14e 09/09/2014 > > Workqueue: events_unbound commit_work > > RIP: 0010:amdgpu_dm_atomic_commit_tail+0x2e6/0xd60 [amdgpu] > > Are you able to consistently reproduce this issue? Is it the same setup and > same conditions as before? I haven't been able to see it in my testing at > least. Yes, just having PageFlip enabled in amdgpu guarantees it. Changing anything other than PageFlip doesn't seem to affect it. Forcing TearFree on with PageFlip disabled may also trigger it, I think. You may try my previously linked kernel build in your testing but I doubt that it has something specific for it. It may be not reproducible with modesetting X driver because it fails to engage page flipping on init and throws a bunch of errors about it in Xorg.0.log. For some reason I'm unable to use modesetting X driver at all, even with page flipping disabled, it draws only mouse cursor on black background instead of sddm login screen. So I have to use amdgpu with PageFlip and TearFree explicitly disabled. But then another, rarer 0010:amdgpu_vm_update_directories+0xe7/0x260 dereference may happen regardless (which I suspect is connected with vm_update_mode option, unlike the first one). By the way, is there any disadvantage in forcing TearFree to be always on when it works ? Like additional frame of latency or something like that ? -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
