Processors

[kheper]

According to the specs, the graphics frequency (SCLK) of the 4650g is 1900 MHz.  On my system, the SCLK is stuck at 400 MHz. Unlike the MCLK, the SCLK does not change, regardless of whatever task hits it. For example - in the Furmark benchmark, I recorded a whopping 0 FPS score.  Does anyone have experience with this behavior? Is this a hardware or a software (driver) issue? 

I'm running Debian Linux. 

From /sys/kernel/debug/dri/0/amdgpu_pm_info:
 
GFX Clocks and Power:
1800 MHz (MCLK)
400 MHz (SCLK)
0 MHz (PSTATE_SCLK)
0 MHz (PSTATE_MCLK)
943 mV (VDDGFX)
1199 mV (VDDNB)
0.2 W (average GPU)

[kheper · Accepted solution]

After I "upgraded" to a development release of Ubuntu, the frequency of the SCLK - finally - shifts. However, this release of Ubuntu is buggy as all get out. The issue - as it appears to have turned out - is software related. My guess is that the mesa libs are the culprits.