This bug was fixed in the package systemd - 237-3ubuntu10.2
---------------
systemd (237-3ubuntu10.2) bionic; urgency=medium
* logind: backport v238/v239 fixes for handling DRM devices.
These changes introduce all the fixes that correct handling of open fd's
related to the DRM devices, as used by for example NVIDIA GPUs. This
backport
includes some refactoring, corrections, and comment updates. This to insure
that correct history is preserved, code comments match reality, and to ease
backporting logind fixes in the future SRUs. (LP: #1777099)
* Disable dh_installinit generation of tmpfiles for the systemd package.
Replace with a manual safe call to systemd-tmpfiles which will process any
updates to the tmpfiles shipped by systemd package, taking into account any
overrides shipped by other packages, sysadmin, or specified in the runtime
directories. (LP: #1748147)
systemd (237-3ubuntu10.1) bionic; urgency=medium
[ Dimitri John Ledkov ]
* hwdb: Fix wlan/rfkill keycode on Dell systems. (LP: #1762385)
* Cherrypick upstream fix for corrected detection of Virtualbox & Xen.
(LP: #1768104)
* Further improve captive portal workarounds.
Retry any NXDOMAIN results with lower feature levels, instead of just those
with 'secure' in the domain name. (LP: #1766969)
[ Michael Biebl ]
* Add dependencies of libsystemd-shared to Pre-Depends.
This is necessary so systemctl is functional at all times during a
dist-upgrade. (Closes: #897986) (LP: #1771791)
[ Mario Limonciello ]
* Fix hibernate disk offsets.
Configure resume offset via sysfs, to enable resume from a swapfile.
(LP: #1760106)
-- Dimitri John Ledkov 🌈 <x...@ubuntu.com> Fri, 22 Jun 2018 13:55:09
+0100
** Changed in: systemd (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1777099
Title:
[backport] DRM devices opened by logind stay referenced indefinitely
by PID 1
Status in OEM Priority Project:
Triaged
Status in systemd:
Fix Released
Status in systemd package in Ubuntu:
Fix Committed
Status in systemd source package in Bionic:
Fix Released
Bug description:
[Impact]
* It should be possible to change DRM driver without rebooting.
* It should be possible to correctly suspend & resume, whilst preserving
driver state.
* This bug is for userspace/logind fixes, required to get above working.
* Related kernel change is
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1778658
*
https://github.com/torvalds/linux/commit/5775b843a619b3c93f946e2b55a208d9f0f48b59
[Test Case]
* Test and verify that on machines with Nvidia discrete graphics, one
can change performance/power-saving modes without rebooting.
[Regression Potential]
* There are changes to the fd handling that are passed to logind. At
worst, fd to the NVIDIA driver will still be held, and thus one would
continue to not be able to switch graphics modes without rebooting.
[Other Info]
* original bug report:
refer to https://github.com/systemd/systemd/issues/6908
we need that solution to make NVIDIA dGPU switching works.
impacted issue:
https://bugs.launchpad.net/somerville/+bug/1774326
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