[Bug 109583] Black screen on skylake after 18.0 => 18.2 update

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Feb 8 08:04:22 UTC 2019


            Bug ID: 109583
           Summary: Black screen on skylake after 18.0 => 18.2 update
           Product: Mesa
           Version: 18.2
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: alkisg at gmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Several schools reported black screens after normally updating their Ubuntu
boxes from 18.0.5-0ubuntu0~18.04.1 to 18.2.2-0ubuntu1~18.04.1.

Downgrading mesa fixes the problem.

lspci: 00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics
530 [8086:1912] (rev 06)         Subsystem: ASUSTeK Computer Inc. HD Graphics
530 [1043:8694]    Kernel modules: i915

Unfortunately I can't find a lot of useful information, here are some bits:
 * systemctl --failed says "gpu-manager" and "lightdm" have failed
 * Xorg.log is clean: https://termbin.com/6l2b
 * dmesg too: https://termbin.com/ip4e
 * It happens on lightdm/MATE, I don't know about Ubuntu GNOME.
 * If one runs `xinit` from ssh, it fails with:
i965: Failed to submit batchbuffer: Invalid argument

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