Public bug reported:
Hi,
since the upgrade to Xenial I've had graphic issues on my NAS/HTPC box.
All white is rendered as a noisy grey, and colors have a bunch of bright
turquoise pixels.
Back then I've reverted to the old 4.2.0-35 kernel I had before and things were
fine.
The recent update to 4.4.0-22 didn't help, so I decided it is time to debug and
fix that since I don't know how much more LTS users might be affected.
I lack experience in debugging graphical issues, what are the right next steps?
- are there obvious extra debug information sources that might help?
- I tried most of the common troubleshooting guides without any effect, let me
know if I should tweak any i915 parms or so.
- would it be useful to go to a Yakkety kernel, and if this fixing it bisecting
from there - if so on what tree - I don't want a full Y upgrade on this box?
I made some screenshots, but the issue is not visible there - this might
be a hint in itself as it should imply that the error so is "after" the
graphics buffer right?
I'll attach the screenshots and cam shots of the same so you can see
what I mean.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-22-generic 4.4.0-22.40
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: paelzer 1918 F.... pulseaudio
CurrentDesktop: KDE
Date: Thu Jun 9 07:51:07 2016
HibernationDevice: RESUME=UUID=158370b1-2e39-4f92-b9ff-1f2fdcf63c21
InstallationDate: Installed on 2012-04-29 (1501 days ago)
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64
(20120424.1)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
MachineType: System manufacturer System Product Name
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic
root=UUID=eacb9ac2-7523-41c7-bde4-b78a3cd3cf97 ro bootdegraded=true nosplash
apm=on apm=power-off nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf
nomdmonisw nomdmonddf nomdmonisw
RelatedPackageVersions:
linux-restricted-modules-4.4.0-22-generic N/A
linux-backports-modules-4.4.0-22-generic N/A
linux-firmware 1.157
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-05-09 (30 days ago)
dmi.bios.date: 12/04/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0907
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8H67-I
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr0907:bd12/04/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H67-I:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1590650
Title:
Noisy white turquoise shadows in colors and since Xenial
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