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. ** Attachment added: "IMG_2787.JPG" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1389703/+attachment/4409005/+files/IMG_2787.JPG -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1389703 Title: [iMac8,1] broken colors after suspend/resume Status in linux package in Ubuntu: Triaged Bug description: 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 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1389703/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp