This bug was fixed in the package gdm3 - 3.28.3-0ubuntu18.04.3
---------------
gdm3 (3.28.3-0ubuntu18.04.3) bionic; urgency=medium
[ Bin Li ]
* Add utils-add-new-gdm-disable-wayland-binary.patch, cherry-picked
from cosmic. (LP: #1780076)
-- Bin Li <[email protected]> Tue, 09 Oct 2018 09:42:42 +0100
** Changed in: gdm3 (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1780076
Title:
18.04 login screen is skewed/distorted (incorrect stride) when using
hibmc_drm graphics
Status in gdm3 package in Ubuntu:
Fix Released
Status in mutter package in Ubuntu:
Won't Fix
Status in gdm3 source package in Bionic:
Fix Released
Status in mutter source package in Bionic:
Won't Fix
Bug description:
[Impact]
* The login screen is blur, with Huawei's Hi1710 chipset. And below
is the hardware information.
05:00.0 VGA compatible controller [0300]: Huawei Technologies Co.,
Ltd. Hi1710 [iBMC Intelligent Management system chip w/VGA support]
[19e5:1711] (rev 01)
* It's really big effect for our customer when they use the arm
server. It's an hardware specific issue, and I've debugged with the
mutter for a while upstream's help, but no luck. And the workaround
patches was accepted by upstream and now in 18.10.
[Test Case]
* It's an hardware specific issue, installed the 18.04 on Huawei's
Hi1710 arm server. After boot up, you will found the login screen is
distorted.
[Regression Potential]
* It's just a kind of workaround, we add one the udev rule to skip
Huawei's chipset, which won't affects other platform.
[Other Info]
* Upstream: https://gitlab.gnome.org/GNOME/mutter/issues/219
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