I can duplicate this problem with CentOS 7.1. When I run kernel 3.10.0-229.1.2.el7.centos.plus I don't see (or at least notice) the performance issue after resuming from suspend, however I do receive the same errors. Additionally X will randomly hang (maybe 5% of the time) when I resume, I suspect this may be related to my video card (since those are the only errors I ever see when resuming).
When I run kernel 4.0.0-1.el7.elrepo.x86_64 I do have the performance issue after resuming from suspend (and receive the same errors). For me I see the huge graphics performance hit when I connect to a Windows 7 PC with xfreerdp. It's so slow it's unusable. However if I perform the same xfreerdp connection before I ever suspend/resume my PC it's very fast and responsive. I found a work around which is to use the "radeon.dpm=0" kernel boot option. I did this by following these steps: vi /etc/default/grub -Append "radeon.dpm=0" to the end of the "GRUB_CMDLINE_LINUX" option: grub2-mkconfig -o /boot/grub2/grub.cfg Booting with "radeon.dpm=0" switched me to the "profile" pm method as shown with this command: cat /sys/class/drm/card0/device/power_method profile With "radeon.dpm=0" I no longer get any error messages and I no longer have any performance issues after resuming from suspend. Time will tell if it fixes my random hang issue. I haven't checked yet if there's any noticeable power draw difference. Below I've pasted some relevant hardware and log info. My hardware: Motherboard = GA-790FXTA-UD5/GA-790FXTA-UD5, BIOS F3j CPU = AMD Phenom II X4 910e Deneb Quad-Core 2.6GHz Socket AM3 65W Desktop Processor Video card = Gigabyte Radeon HD 4550 512 MB DDR3 (AMD RV710) Two pages with useful information related to radeon power management: https://wiki.archlinux.org/index.php/ATI#Dynamic_power_management http://www.x.org/wiki/RadeonFeature/#index3h2 grep -i rv7 /var/log/messages //With kernel 3.10.0-229.1.2.el7.centos.plus Apr 29 08:18:58 black kernel: [drm:rv730_stop_dpm] *ERROR* Could not force DPM to low Apr 29 08:18:58 black kernel: [drm:rv770_dpm_set_power_state] *ERROR* rv770_set_sw_state failed //With kernel 4.0.0-1.el7.elrepo.x86_64, note that the error messages have slightly changed (added "[radeon]") Apr 29 09:21:49 black kernel: [drm:rv730_stop_dpm [radeon]] *ERROR* Could not force DPM to low Apr 29 09:22:40 black kernel: [drm:rv770_dpm_set_power_state [radeon]] *ERROR* rv770_set_sw_state failed glxinfo |grep "OpenGL renderer" OpenGL renderer string: Gallium 0.4 on AMD RV710 -- 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/1319589 Title: [drm:rv770_dpm_set_power_state] *ERROR* rv770_set_sw_state failed Status in Direct Rendering Infrastructure: Confirmed Status in linux package in Ubuntu: Expired Bug description: Hello, On Ubuntu 14.04 LTS, when the computer starts (before the splash screen appears), I see this error in the console: [drm:rv770_dpm_set_power_state] *ERROR* rv770_set_sw_state failed I don't know what does exactly this bug, but I supposed that it's not normal. OS: Linux Type: amd64 Distribution: Ubuntu 14.04 LTS GPU: ATI Mobility Radeon HD 4570 → 02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 4530/4570/545v] Kernel: 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux I use the free driver for Linux, ATI doesn't support this GPU with proprietary drivers today... but without this little bug, the free drivers are very good :) Message appears at [ 17.026313] (See dmesg file) Thank you. --- ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: valentin 4277 F.... pulseaudio /dev/snd/controlC0: valentin 4277 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 14.04 HibernationDevice: RESUME=UUID=2fe681c2-5497-453b-bc19-4401ca76baaf InstallationDate: Installed on 2014-05-06 (8 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326) MachineType: Acer Aspire 5542 Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=20964cff-7885-4482-8618-d60d52c7d229 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127.2 Tags: trusty Uname: Linux 3.13.0-24-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 01/18/2010 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: V1.09 dmi.board.name: JV50TR dmi.board.vendor: Acer dmi.board.version: Rev dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: None dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.09:bd01/18/2010:svnAcer:pnAspire5542:pvr0100:rvnAcer:rnJV50TR:rvrRev:cvnAcer:ct10:cvrNone: dmi.product.name: Aspire 5542 dmi.product.version: 0100 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/dri/+bug/1319589/+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
