this is caused by enabling softpin in mesa, which is supported in kernel
4.5 and up but is still somewhat buggy as seen here.. we need these
commits backported to the kernel:
9125963a9494253fa5a29cc1b4169885d2be7042 drm/i915: Mark up GTT sizes as u64
6fc4e48f9ed46e9adff236a0c350074aafa3b7fa drm/i915: Compare user's 64b GTT
offset even on 32b
but since 18.04.2 is about to be released, it's best to revert enabling
softpin in mesa, and enable it again for 18.04.3.
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1815172
Title:
Black screen on skylake after 18.0 => 18.2 update
Status in Mesa:
Confirmed
Status in linux package in Ubuntu:
Confirmed
Status in mesa package in Ubuntu:
New
Status in linux source package in Bionic:
New
Status in mesa source package in Bionic:
New
Status in linux source package in Cosmic:
New
Status in mesa source package in Cosmic:
New
Bug description:
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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