Reopening mesa for bionic, because the revert needs to be dropped once
the kernel is fixed, otherwise Ice Lake is broken because it needs
softpin for the DRI driver to work.
** Changed in: mesa (Ubuntu Bionic)
Status: Fix Released => In Progress
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1815172
Title:
[bionic] drm/i915: softpin broken, needs to be fixed for 32bit mesa
Status in Mesa:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in mesa package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
New
Status in mesa source package in Bionic:
In Progress
Status in linux source package in Cosmic:
Won't Fix
Status in mesa source package in Cosmic:
Fix Released
Bug description:
[Impact]
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
This is caused by mesa assuming that soft-pinning on GEN8+ is working
since kernel 4.5, but in fact this issue wasn't fixed until 4.19.3. So
a proper fix would be to backport commits from 4.19.3/4.20 to fix GTT
sizes/pin flags, but that's left for future.
[Test case]
install fixed mesa or kernel, check that the regression is fixed
[Regression potential]
mesa: shouldn't be any, it just reverts the change to always soft-pin
(TODO kernel: adds commits from upstream stable, which have been well tested
upstream by now)
To manage notifications about this bug go to:
https://bugs.launchpad.net/mesa/+bug/1815172/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
