[Bug 102339] QXL driver hangs on virt guest login, kernel 4.12

[Bug 102339] QXL driver hangs on virt guest login, kernel 4.12

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=102339

            Bug ID: 102339
           Summary: QXL driver hangs on virt guest login, kernel 4.12
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: high
         Component: DRM/other
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: chuckebbert.lk@gmail.com

>From https://bugzilla.redhat.com/show_bug.cgi?id=1481365

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. Another
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 different 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.

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[Bug 102339] QXL driver hangs on virt guest login, kernel 4.12

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=102339

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|NEW                         |RESOLVED

--- Comment #1 from Martin Peres <martin.peres@free.fr> ---
Hi,

Freedesktop's Bugzilla instance is EOLed and open bugs are about to be migrated
to http://gitlab.freedesktop.org.

To avoid migrating out of date bugs, I am now closing all the bugs that did not
see any activity in the past year. If the issue is still happening, please
create a new bug in the relevant project at https://gitlab.freedesktop.org/drm
(use misc by default).

Sorry about the noise!

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