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Hello,
I am having an issue with my Arch installation on my Asus UX32LN. I am currently using GNOME 3.18 with gdm. The laptop has integrated intel and dedicated nvidia 840m graphics. I am using bumblebee to handle the switching between the graphic cards and everything regarding that seems to work (primusrun glxgears, etc).
My issue is that after a short while after booting the system or resuming from suspend there is a significant change in the smoothness of the GNOME desktop environment. I found that the thing causing this "sluggishness" is that the refresh rate of the screen changes from 60Hz to 40Hz. I measured the refresh rate by running glxgears. Right after bootup the fps is at 60 as expected. Running glxgears after a few minutes the fps is at 40 which means that the refresh rate must have switched somehow.
xrandr looks like this while getting 40 fps in glxgears:
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
1920x1080 60.00*+ 40.00
1400x1050 59.98
1600x900 60.00
1280x1024 60.02
1280x960 60.00
1368x768 60.00
1280x720 60.00
1024x768 60.00
1024x576 60.00
960x540 60.00
800x600 60.32 56.25
864x486 60.00
640x480 59.94
720x405 60.00
640x360 60.00
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)The refresh rate is set to 60 yet 40 is in use.
If I switch to 40 with "xrandr -r 40" and then back with "xrandr -r 60" the smoothness is back for a while. Then something makes the refresh rate switch back to 40 even though xrandr says that it's still at 60.
I have no idea what could be causing this issue.
Does anybody recognize this behavior?
Last edited by gustapo (2015-11-03 22:21:23)
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