<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - On HD6850, Power Profile doesn't change if 2 screen is attached." href="https://bugs.freedesktop.org/show_bug.cgi?id=49981#c24">Comment # 24</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - On HD6850, Power Profile doesn't change if 2 screen is attached." href="https://bugs.freedesktop.org/show_bug.cgi?id=49981">bug 49981</a> from <a class="email" href="mailto:awaters1@gmail.com" title="Anthony Waters <awaters1@gmail.com>"> Anthony Waters</a> <pre>On a HD6950 this patches causes the GPU to lock up if the GPU is in the low power profile and the x server is started with multiple monitors attached. The x server doesn't crash immediatly, but crashes upon opening anything. I am unable to SSH in so I cannot obtain a dmesg upon the crash. Here are more details 1. Start up computer 2. Put gpu into low power profile through `echo low > /sys/class/drm/card0/device/power_profile` 3. radeon_pm_info shows something like default engine clock: 800000 kHz current engine clock: 249990 kHz default memory clock: 1250000 kHz current memory clock: 1250000 kHz voltage: 900 mV (as expected because the patch pushesh the memory clock to the maximum with multiple heads) 4. start the x server and open an application, GPU locks up/crashes and displays corruption some times However, if the GPU is set to be in the high power profile it doesn't crash. Here are the power tables from the GPU [ 0.814049] [drm:radeon_pm_print_states], 4 Power State(s) [ 0.814050] [drm:radeon_pm_print_states], State 0: [ 0.814051] [drm:radeon_pm_print_states], Default [ 0.814052] [drm:radeon_pm_print_states], [ 0.814053] 16 PCIE Lanes [ 0.814138] [drm:radeon_pm_print_states], 3 Clock Mode(s) [ 0.814138] [drm:radeon_pm_print_states], 0 e: 800000 m: 1250000 v: 1175 [ 0.814140] [drm:radeon_pm_print_states], 1 e: 800000 m: 1250000 v: 1175 [ 0.814141] [drm:radeon_pm_print_states], 2 e: 800000 m: 1250000 v: 1175 [ 0.814142] [drm:radeon_pm_print_states], State 1: Performance [ 0.814143] [drm:radeon_pm_print_states], 16 PCIE Lanes [ 0.814144] [drm:radeon_pm_print_states], 3 Clock Mode(s) [ 0.814145] [drm:radeon_pm_print_states], 0 e: 250000 m: 150000 v: 900 [ 0.814146] [drm:radeon_pm_print_states], 1 e: 500000 m: 1250000 v: 1000 [ 0.814147] [drm:radeon_pm_print_states], 2 e: 870000 m: 1250000 v: 1175 [ 0.814148] [drm:radeon_pm_print_states], State 2: [ 0.814149] [drm:radeon_pm_print_states], 16 PCIE Lanes [ 0.814150] [drm:radeon_pm_print_states], 3 Clock Mode(s) [ 0.814150] [drm:radeon_pm_print_states], 0 e: 500000 m: 1250000 v: 1000 [ 0.814151] [drm:radeon_pm_print_states], 1 e: 500000 m: 1250000 v: 1000 [ 0.814152] [drm:radeon_pm_print_states], 2 e: 870000 m: 1250000 v: 1175 [ 0.814154] [drm:radeon_pm_print_states], State 3: [ 0.814154] [drm:radeon_pm_print_states], 16 PCIE Lanes [ 0.814155] [drm:radeon_pm_print_states], 3 Clock Mode(s) [ 0.814156] [drm:radeon_pm_print_states], 0 e: 500000 m: 1250000 v: 1000 [ 0.814157] [drm:radeon_pm_print_states], 1 e: 500000 m: 1250000 v: 1000 [ 0.814158] [drm:radeon_pm_print_states], 2 e: 870000 m: 1250000 v: 1175 To summarize (all with multiple heads) 1. e: 250000 m: 1250000 v: 900 - crash 2. e: 800000 m: 1250000 v: 1175 - no crash 3. e: 250000 m: 150000 v: 900 - no crash</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>