*** This bug is a duplicate of bug 1554613 ***
https://bugs.launchpad.net/bugs/1554613
As comment #117 suggests, disabling tlp fixes it for my Broadwell
Celeron laptop. However, another way to fix it (at least for some of us)
is to set ALPM to a higher power state, which means you can keep tlp
enabled. In the tlp config file /etc/default/tlp, set the line
SATA_LINKPWR_ON_BAT=min_power to SATA_LINKPWR_ON_BAT=medium_power or to
SATA_LINKPWR_ON_BAT=max_performance. If not running tlp, add the same
line to /etc/pm/config.d/sata_alpm (and probably also for
SATA_LINKPWR_ON_AC).
The problem with this solution is that on chips where the southbridge
and cpu are packaged together (Broadwell, Haswell, etc.), the package
won't go into lower power states, so battery suffers. For instance, I
can't get it into anything lower than C2, as powertop indicates.
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1522922
Title:
Screen flickering in Intel i915 driver
Status in Nouveau Xorg driver:
Incomplete
Status in xserver-xorg-video-intel package in Ubuntu:
Triaged
Bug description:
There's an upstream bug reported here
https://bugs.freedesktop.org/show_bug.cgi?id=91393 that causes screen
flickering when using the Intel i915 builtin driver (at resolutions
lower than the maximal one).
I think that it will be fixed in newer kernel versions, but for the
time being, as reported here
https://bugs.freedesktop.org/show_bug.cgi?id=91393#c25 (and as
personally tested) reverting those two commits fixes the problem.
Would that be possible to release a fixed version for the 4.2.0
stream?
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-19-generic 4.2.0-19.23
ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
Uname: Linux 4.2.0-19-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: bettini 1378 F.... pulseaudio
/dev/snd/controlC1: bettini 1378 F.... pulseaudio
CurrentDesktop: KDE
Date: Fri Dec 4 19:01:00 2015
HibernationDevice: RESUME=UUID=7ddbc972-3ad6-40de-9313-2bb9395145f9
InstallationDate: Installed on 2015-05-08 (210 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: Dell Inc. Dell Precision M3800
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-19-generic
root=UUID=dd2c7064-53b9-4720-96ab-5e8a3f2db3ea ro noprompt quiet splash
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.2.0-19-generic N/A
linux-backports-modules-4.2.0-19-generic N/A
linux-firmware 1.149.3
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: Upgraded to wily on 2015-11-07 (26 days ago)
dmi.bios.date: 08/17/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A10
dmi.board.name: Dell Precision M3800
dmi.board.vendor: Dell Inc.
dmi.board.version: A10
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias:
dmi:bvnDellInc.:bvrA10:bd08/17/2015:svnDellInc.:pnDellPrecisionM3800:pvrA10:rvnDellInc.:rnDellPrecisionM3800:rvrA10:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Dell Precision M3800
dmi.product.version: A10
dmi.sys.vendor: Dell Inc.
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