Arch Linux

mark001

Banned

Registered: 2014-11-17

Posts: 9

PWM i915 intel-gpu-tools - how to know reg address

Hi

I found I face the screen flickering issue which causes eyestrain described here https://wiki.archlinux.org/index.php/ba … 15_only.29 and here https://01.org/linuxgraphics/documentat … tool-guide ; I have Intel HD Graphics/Sandy Bridge/Bay Trail;
By default I have 60Hz but EDID says clock 77.000Mhz

I tried to run util :
- intel_reg_read 0xC8254
- intel_reg_read 0xC6204
...these both addresses output is "0x0"

So my question is... how do I know what reg address I have? Or something is wrong with intel-gpu-tools?

p.s. I am not 100% sure it is the screen flickering problem only (so please advise any helpful another suggestion(s)) because I do suspect a wrong conf(s) combination or similar... Currently I came from sna to uxa to make rendering more clear and this worked a bit but still it seems like screen is micro-shaking or I don't know how to describe the effect; So I do need your advise where to look at...

Thanks

Last edited by mark001 (2014-11-17 07:14:14)