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[Bug 1590650] Re: Noisy white turquoise shadows in colors and since Xenial
** Attachment added: "screenshot not showing the issue II"
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Noisy white turquoise shadows in colors and since Xenial
Status in linux package in Ubuntu:
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.
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
USER PID ACCESS COMMAND
/dev/snd/controlC0: paelzer 1918 F.... pulseaudio
Date: Thu Jun 9 07:51:07 2016
InstallationDate: Installed on 2012-04-29 (1501 days ago)
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64 (20120424.1)
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
UpgradeStatus: Upgraded to xenial on 2016-05-09 (30 days ago)
dmi.bios.vendor: American Megatrends Inc.
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
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