<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Radeon HD 4570 set dpm state fails after suspend" href="https://bugs.freedesktop.org/show_bug.cgi?id=76130#c11">Comment # 11</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Radeon HD 4570 set dpm state fails after suspend" href="https://bugs.freedesktop.org/show_bug.cgi?id=76130">bug 76130</a> from <a class="email" href="mailto:freedesktop.jim-j@mamber.net" title="Jim <freedesktop.jim-j@mamber.net>"> Jim</a> <pre>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: <a href="https://wiki.archlinux.org/index.php/ATI#Dynamic_power_management">https://wiki.archlinux.org/index.php/ATI#Dynamic_power_management</a> <a href="http://www.x.org/wiki/RadeonFeature/#index3h2">http://www.x.org/wiki/RadeonFeature/#index3h2</a> 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</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>