Kai Mast, as per http://www.dell.com/support/home/us/en/04/product- support/product/optiplex-7010/drivers/advanced an update to your computer's buggy and outdated BIOS is available (A20). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything?
If it doesn't, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report. Once the BIOS is updated, if the problem is still reproducible, and the information above is provided, then please mark this report Status New. Otherwise, please mark this as Invalid. Thank you for your understanding. ** Tags added: bios-outdated-a20 ** Changed in: xserver-xorg-video-ati (Ubuntu) Importance: Undecided => Low ** Changed in: xserver-xorg-video-ati (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/1441687 Title: Screen corruption after suspend/reboot Status in xserver-xorg-driver-ati: Confirmed Status in xserver-xorg-video-ati package in Ubuntu: Incomplete Bug description: Switching to a TTY and back fixes it. Observed on trusty, utopic, and vivd. And on many different machines with the same hardware. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: xserver-xorg-video-radeon 1:7.5.0-1ubuntu2 ProcVersionSignature: Ubuntu 3.19.0-12.12-generic 3.19.3 Uname: Linux 3.19.0-12-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.17-0ubuntu1 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Wed Apr 8 11:13:53 2015 DistUpgraded: 2015-01-24 16:21:53,459 DEBUG enabling apt cron job DistroCodename: vivid DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] Turks PRO [Radeon HD 7570] [1002:675d] (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:2b20] InstallationDate: Installed on 2014-07-25 (257 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) MachineType: Dell Inc. OptiPlex 7010 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-12-generic root=UUID=e505ac2d-47bc-4eb6-8759-06d542cb82b8 ro quiet splash vt.handoff=7 SourcePackage: xserver-xorg-video-ati SystemImageInfo: current build number: 0 device name: channel: daily last update: Unknown UpgradeStatus: Upgraded to vivid on 2015-01-24 (73 days ago) dmi.bios.date: 09/09/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A16 dmi.board.name: 0GY6Y8 dmi.board.vendor: Dell Inc. dmi.board.version: A03 dmi.chassis.type: 6 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA16:bd09/09/2013:svnDellInc.:pnOptiPlex7010:pvr01:rvnDellInc.:rn0GY6Y8:rvrA03:cvnDellInc.:ct6:cvr: dmi.product.name: OptiPlex 7010 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.12.1+15.04.20150330-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.60-2 version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2build1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1 xserver.bootTime: Wed Apr 8 11:12:48 2015 xserver.configfile: default xserver.devices: input Power Button KEYBOARD, id 6 input Power Button KEYBOARD, id 7 input Dell Dell USB Entry Keyboard KEYBOARD, id 8 input Logitech USB Optical Mouse MOUSE, id 9 xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: Output DVI-0 xserver.version: 2:1.17.1-0ubuntu3 xserver.video_driver: radeon To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-driver-ati/+bug/1441687/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

