My laptop is equipped with an AMD E2-1800 processor which comes paired with a radeon HD7340 video processor. It appears that the driver incorrectly sets the clock speed for this model. For example: [root@localhost ~]# cat /sys/kernel/debug/dri/0/radeon_pm_info default engine clock: 200000 kHz current engine clock: 5730 kHz default memory clock: 667000 kHz I believe this GPU is capable of running at 523-680Mhz with the latter number being turbo mode. However, the maximum engine clock appears to be stuck at 200MHz and the current clock is only 5Mhz. The current clock appears to change, but I've never seen go higher than 70Mhz. With the clock being so low, this makes for a sluggish experience when using a composited desktop like Gnome 3. I have tried changing the power management state to use the dynamic setting, but this has had no impact on the clock speeds posted. [root@localhost ~]# cat /sys/class/drm/card0/device/power_method dynpm I'm currently using the latest stable radeon driver (version 7.1) on Mageia Linux with kernel 3.8. Is this a configuration problem, or a problem with the driver?
Created attachment 76713 [details] [review] report proper current engine clock on APUs The method we use to read back the current engine clock does not work correctly on APUs. The attached patch fixes that. As for supporting clocks beyond the default, that is not implemented yet.
Thanks for the quick reply! Pardon my newbiness, but is the patch meant for me? Or is it applied towards the next ati driver release? I've never dealt with a patch before.
(In reply to comment #2) > Thanks for the quick reply! Pardon my newbiness, but is the patch meant for > me? Or is it applied towards the next ati driver release? I've never dealt > with a patch before. Yes, it's a kernel patch. It will report the correct current clock in the debugfs pm output.
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