** Package changed: linux-signed (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Cosmic)
Importance: Medium
Status: Triaged
** Also affects: linux (Ubuntu Artful)
Importance: Undecided
Status: New
** No longer affects: linux (Ubuntu Artful)
** Changed in: linux (Ubuntu Bionic)
Status: New => Triaged
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => Medium
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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/1774875
Title:
Internal laptop display defaults to low refresh rate
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Bionic:
Triaged
Status in linux source package in Cosmic:
Triaged
Bug description:
It appears that ever since kernel ~4.14, there was a bug in i915 DRM
that caused the internal laptop displays connected by eDP to default
to 40 Hz screen refresh rate.
Affected Ubuntu release: 18.04
Kernel package version: 4.15.0-22.24
What you expected to happen: The refresh rate has a sane default setting
What happened instead: The refresh rate defaults to 40 Hz
Upstream bug report: https://bugs.freedesktop.org/show_bug.cgi?id=103497
This has already been fixed in drm-tip:
https://cgit.freedesktop.org/drm-tip/commit/?id=d93fa1b47b8fcd149b5091f18385304f402a8e15
I do confirm that the latest daily build cod/tip/drm-tip/2018-06-03
(8fdb62e0511e81fa935059c274a2457361fdb679) of drm-tip kernel from
http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/ indeed
fixes this issue for me.
Known workarounds: The user can force the display to use other refresh
rates close to 60 Hz (59,96 works quite well in my case)
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-22-generic 4.15.0-22.24
Uname: Linux 4.17.0-994-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Jun 3 16:53:20 2018
InstallationDate: Installed on 2018-06-03 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=pl_PL.UTF-8
SHELL=/bin/bash
SourcePackage: linux-signed
UpgradeStatus: No upgrade log present (probably fresh install)
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