From https://bugzilla.redhat.com/show_bug.cgi?id=3D1481365
Description of problem:
Using KVM, QXL driver emits error message over and over, I never get to my =
home
screen. It seems to be happening while attempting to switch resolution. Ano=
ther
user reports that everything works if he uses 1024x768.
Version-Release number of selected component (if applicable):
4.12.5
Steps to Reproduce:
1. Remove "rhgb" from kernel command line because of a possibly d=
ifferent QXL
bug (don't have the link right now.)
2. Boot into graphical mode under KVM. Login screen appears, try to log in.
3. Desktop never appears. System log keeps getting these messages:
Aug 13 14:03:40 localhost-live kernel: f 4026531862#140: failed to wait on
release 22 after spincount 301
Aug 13 14:03:41 localhost-live kernel: f 4026531862#140: failed to wait on
release 22 after spincount 301
Aug 13 14:03:41 localhost-live kernel: f 4026531862#140: failed to wait on
release 22 after spincount 301
Aug 13 14:03:41 localhost-live kernel: f 4026531864#142: failed to wait on
release 24 after spincount 301
Aug 13 14:03:42 localhost-live kernel: f 4026531864#142: failed to wait on
release 24 after spincount 301
Aug 13 14:03:42 localhost-live kernel: f 4026531864#142: failed to wait on
release 24 after spincount 301
Message is from drivers/gpu/drm/qxl/qxl_release.c::qxl_fence_wait()
DMA fence operations are timing out.
System can be shut down normally from the VM monitor, it's not frozen. The =
VM
is only usable in text console mode.