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Message #178780
[Bug 1575071] Re: Graphics corruption (framebuffer offset) in i915 on 4.4.0
Update: There is very rare display flicker, but very usable.
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https://bugs.launchpad.net/bugs/1575071
Title:
Graphics corruption (framebuffer offset) in i915 on 4.4.0
Status in linux package in Ubuntu:
Incomplete
Bug description:
Appeared after upgrading to 16.04 LTS. Mostly happens with switching
channels in a full-screen irssi window by using Alt and the number
keys (or the top row of the keyboard).
Entire screen flickers between normal view, and a semi-arbitary offset
view (with the entire screen offset by about 50-100 pixel, wrapping to
the other side). Minor irritation to begin with.
Eventually lead to the entire screen blanking save for a solid
yellow/green line (about 5-10 px wide) on the left, occasionally (~1s)
flicking back to the correct contents.
Rebooting into 4.2.0 (left over from before the upgrade) appears to
have fixed the issue.
Hardware: Toshiba Portege z20t
- "VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated Graphics [8086:161e] (rev 09) (prog-if 00 [VGA controller])"
Relevant packages (assuming that they weren't captured):
- linux-image-4.4.0-21-generic
- linux-image-extra-4.4.0-21-generic
- (working version is 4.2.0-35)
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-extra-4.4.0-21-generic 4.4.0-21.37
ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: tpg 2401 F.... pulseaudio
/dev/snd/controlC0: tpg 2401 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Apr 26 17:08:04 2016
HibernationDevice: RESUME=UUID=ab95a533-52f3-4458-96dc-9119684b0ed6
InstallationDate: Installed on 2015-06-19 (312 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
MachineType: TOSHIBA PORTEGE Z20t-B
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-35-generic root=UUID=b6cc139d-95e4-48f1-a3a8-284dbdb3b6fa ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.2.0-35-generic N/A
linux-backports-modules-4.2.0-35-generic N/A
linux-firmware 1.157
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-04-25 (1 days ago)
dmi.bios.date: 01/06/2015
dmi.bios.vendor: TOSHIBA
dmi.bios.version: Version 1.60
dmi.board.asset.tag: 0000000000
dmi.board.name: PORTEGE Z20t-B
dmi.board.vendor: TOSHIBA
dmi.board.version: Version A0
dmi.chassis.asset.tag: 0000000000
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: Version 1.0
dmi.modalias: dmi:bvnTOSHIBA:bvrVersion1.60:bd01/06/2015:svnTOSHIBA:pnPORTEGEZ20t-B:pvrPT15BA-00500Y:rvnTOSHIBA:rnPORTEGEZ20t-B:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
dmi.product.name: PORTEGE Z20t-B
dmi.product.version: PT15BA-00500Y
dmi.sys.vendor: TOSHIBA
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References