[iMac8,1] broken colors after suspend/resume

[Lorenzo M]

OS: ubuntu 14.04 on a iMac 2008
Problem: after a suspend/resume, the graphics are broken (here there is an image: https://onedrive.live.com/redir?resid=F360DB4014F86298!22188&authkey=!AISDvz3fV20MHKI&v=3&ithint=photo%2cjpg)
I don't know if is the same problem but when I boot the system I receive this message:
radeon 0000:01:00.0: Invalid ROM contents

WORKAROUND: Boot in BIOS compatibility mode.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-39-generic 3.13.0-39.66
ProcVersionSignature: Ubuntu 3.13.0-39.66-generic 3.13.11.8
Uname: Linux 3.13.0-39-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: lorenzo 1866 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Nov 5 14:41:09 2014
HibernationDevice: RESUME=UUID=bdd73df9-a862-43bf-8fe9-54336feca239
InstallationDate: Installed on 2014-09-21 (44 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64+mac (20140417)
MachineType: Apple Inc. iMac8,1
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-39-generic.efi.signed root=UUID=ca4df9f7-6b9d-4182-8cc8-4d0988878be2 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-39-generic N/A
 linux-backports-modules-3.13.0-39-generic N/A
 linux-firmware 1.127.7
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/09/08
dmi.bios.vendor: Apple Inc.
dmi.bios.version: IM81.88Z.00C1.B00.0802091538
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F227BEC8
dmi.board.vendor: Apple Inc.
dmi.board.version: PVT
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 13
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F227BEC8
dmi.modalias: dmi:bvnAppleInc.:bvrIM81.88Z.00C1.B00.0802091538:bd02/09/08:svnAppleInc.:pniMac8,1:pvr1.0:rvnAppleInc.:rnMac-F227BEC8:rvrPVT:cvnAppleInc.:ct13:cvrMac-F227BEC8:
dmi.product.name: iMac8,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

[Brad Figg (brad-figg)]

This change was made by a bot.

[penalvch (penalvch)]

Lorenzo M, thank you for reporting this and helping make Ubuntu better. Could you please test the latest upstream kernel available from the very top line at the top of the page (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested exactly shown as:
kernel-fixed-upstream-3.18-rc3

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description.

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding.

[Lorenzo M (lorenzom)]

The problem still persist using kernel 3.18-rc3-vivid

[penalvch (penalvch)]

Lorenzo M, did this problem not occur in a release prior to Trusty?

As well, could you please provide the missing information following https://wiki.ubuntu.com/DebuggingKernelSuspend ?

[Lorenzo M (lorenzom)]

I don't know if there was this problem in older version of ubuntu.

[penalvch (penalvch)]

Lorenzo M, for regression testing purposes could you please a test 12.04.0 (kernel 3.2.x) via http://old-releases.ubuntu.com/releases/12.04.0/ ? A live environment would be fine.

[Lorenzo M (lorenzom)]

I've tried Ubuntu 12.04.5 and is affected by the bug

[penalvch (penalvch)]

Lorenzo M, as 12.04.5 has the same kernel as Trusty ( please see https://wiki.ubuntu.com/Kernel/LTSEnablementStack ) this is why I asked for 12.04.0 (kernel 3.2.x) not 12.04.5.

[Lorenzo M (lorenzom)]

Ubuntu 12.04.0 has the same problem

[penalvch (penalvch)]

Lorenzo M, the issue you are reporting is an upstream one. Could you please report this problem to the appropriate mailing list (linux-acpi) by following the instructions _verbatim_ at https://wiki.ubuntu.com/Bugs/Upstream/kernel ?

Please provide a direct URL to your e-mail to the mailing list once you have made it so that it may be tracked.

Thank you for your understanding.

[Lorenzo M (lorenzom)]

Ok, I collected all the information requested by the wiki. How can I send those to linux-acpi mailing list?

[penalvch (penalvch)]

Lorenzo M, consulting the previously mentioned article, it advise how to e-mail the linux-acpi mailing list.

[Lorenzo M (lorenzom)]

Ok done.
Now all I can do is wait for an answer, right?

[Lorenzo M (lorenzom)]

This is the URL of the mail: http://article.gmane.org/gmane.linux.acpi.devel/71944

[Dominik (dominalien)]

I _think_ I'm also having the same bug on my iMac 8,1, but I can't check the screenshot since it's asking me to log in. Anyway, I'm attaching a screenshot of what my screen looks like after resume.

There are flashing/crawling green dots all over the screen, also on the console screens and the shutdown screen.

Other than that, from my limited testing, the computer seems to resume OK.

[Lorenzo M (lorenzom)]

Accidentally I've removed the picture from onedrive so I'll attach here a new one.
By the way your problem is similar to mine but as you can see in the picture my screen is whitish while your is green dotted

[Dominik (dominalien)]

Yeah, that doesn't look alike. Do you have this problem also in the console and on the shutdown screen, or just on the desktop?

[penalvch (penalvch)]

Lorenzo M, any change with the latest mainline kernel 4.1-rc6?

[Dominik (dominalien)]

My flashing green dots certainly appear with kernel 4.1-rc6.

[Lorenzo M (lorenzom)]

I've the same problem with kernel 4.1-rc6

[penalvch (penalvch)]

Lorenzo M, , could you please also report this to the graphics developers via https://bugs.freedesktop.org/enter_bug.cgi?product=xorg&component=Driver/Radeon ?

Please provide a direct URL to your bug report once you have made it so that it may be tracked.

Thank you for your understanding.

[Lorenzo M (lorenzom)]

This is the URL of the report: https://bugs.freedesktop.org/show_bug.cgi?id=90843

[Robert Bjarum (robert-bjarum)]

I have the same problem running kernel 4.2.0-34-generic on a iMac with Gallium 0.4 on AMD RV630 (DM 2.43.0,LLVM 3.6.0)

[penalvch (penalvch)]

Robert Bjarum, to eliminate hardware differences, it will help immensely if you filed a new report with the Ubuntu repository kernel (not mainline/upstream) via a terminal:
ubuntu-bug linux

Please feel free to subscribe me to it.

For more on why this is helpful, please see https://wiki.ubuntu.com/ReportingBugs.