sluggish graphics with intel 620 and dual 4k monitors

syamajala · 2018-10-01 16:17:57

I bought a new thinkpad. I'm trying to 2 4k monitors with it, but things are sluggish. I'm using usb-c cables for both of them. my Xorg config has:

Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "TearFree"    "true"
EndSection

I'm also running: compton --backend xrender --vsync opengl

My window manager is awesome.

seth · 2018-10-01 16:23:41

"xrandr -q"?

syamajala · 2018-10-01 16:25:19

Screen 0: minimum 8 x 8, current 6240 x 3840, maximum 32767 x 32767
eDP1 connected primary 1920x1080+4320+2760 (normal left inverted right x axis y axis) 310mm x 170mm
   1920x1080     60.01*+  59.93    48.01  
   1680x1050     59.88  
   1400x1050     59.98  
   1600x900      60.00    59.95    59.82  
   1280x1024     60.02  
   1400x900      59.96    59.88  
   1280x960      60.00  
   1368x768      60.00    59.88    59.85  
   1280x800      59.81    59.91  
   1280x720      59.86    60.00    59.74  
   1024x768      60.00  
   1024x576      60.00    59.90    59.82  
   960x540       60.00    59.63    59.82  
   800x600       60.32    56.25  
   864x486       60.00    59.92    59.57  
   640x480       59.94  
   720x405       59.51    60.00    58.99  
   640x360       59.84    59.32    60.00  
DP1 connected 2160x3840+0+0 left (normal left inverted right x axis y axis) 600mm x 340mm
   3840x2160     60.00*+  30.00  
   2560x1440     59.95  
   1920x1080     60.00    59.94  
   1600x900      60.00  
   1280x1024     60.02  
   1280x800      59.81  
   1152x864      59.97  
   1280x720      60.00    59.94  
   1024x768      60.00  
   800x600       60.32  
   720x480       60.00    59.94  
   640x480       60.00    59.94  
   3840x2160_60.00  59.98  
DP2 connected 2160x3840+2160+0 right (normal left inverted right x axis y axis) 600mm x 340mm
   3840x2160     60.00*+  30.00  
   2560x1440     59.95  
   1920x1080     60.00    59.94  
   1600x900      60.00  
   1280x1024     60.02  
   1280x800      59.81  
   1152x864      59.97  
   1280x720      60.00    59.94  
   1024x768      60.00  
   800x600       60.32  
   720x480       60.00    59.94  
   640x480       60.00    59.94  
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)

Not sure if this matters but i'm using them in portrait orientation.

seth · 2018-10-01 16:48:15

I assume this is not a problem if you clone the 2 4k outputs (ie. have them cover the same area) and also pivot the HD output (ie. ensure to stay in a 4096x4096 root)?
What if you drop compton (in either layout)?

syamajala · 2018-10-01 17:03:00

It improves when I clone. I don't think I understand what you mean by pivot. Do you mean rotate eDP1 output?

seth · 2018-10-01 17:07:03

Yup. (You're currently running it in landscape, are you not?)
Also ensure to check on compton - the IGP may have serious issues w/ some texture types growing > 2^12 and enter some software mode.

(For this, also best log "glxinfo -l" (that's a lot of text you want to redirect into a file or a pastebin service)

syamajala · 2018-10-02 19:44:21

I have some other issues with this laptop so I decided to return it for a different model. Its probably gonna be a few weeks until I get the new one. I'll have to wait and see if the issue is still there when I get the new one.

Arch Linux

#1 2018-10-01 16:17:57

sluggish graphics with intel 620 and dual 4k monitors

#2 2018-10-01 16:23:41

Re: sluggish graphics with intel 620 and dual 4k monitors

#3 2018-10-01 16:25:19

Re: sluggish graphics with intel 620 and dual 4k monitors

#4 2018-10-01 16:48:15

Re: sluggish graphics with intel 620 and dual 4k monitors

#5 2018-10-01 17:03:00

Re: sluggish graphics with intel 620 and dual 4k monitors

#6 2018-10-01 17:07:03

Re: sluggish graphics with intel 620 and dual 4k monitors

#7 2018-10-02 19:44:21

Re: sluggish graphics with intel 620 and dual 4k monitors

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