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I currently have Arch Linux installed on the Lenovo T540p with a screen resolution of 2880x1620. I opted out of using the NVIDIA GeForce graphics card, so I am using the integrated graphics controller with the open source drivers (xf86-video-intel).
With this setup, the graphics performance is poor - in Gnome, opening the shell is choppy, opening and closing windows lags, and things like the live resize of windows and dragging windows between workspaces is slow. The reason for this is that the drivers don't yet support my GPU at the screen's native resolution of 2880x1620 (I can change the resolution to something like 1280x1024 to see the expected graphics performace).
On Ubuntu, users have this ppa to enable "updated and optimized graphics drivers" for their systems. I've tried out the drivers in that ppa on Ubuntu and there was no lag at all. Is there something similar for Arch? Is there some way to improve the poor graphics performance I am seeing? It may be noteworthy that Intel is releasing another driver package for Ubuntu users in late December or early January, see here.
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Hardware:
Lenovo T540p
2880x1620 IPS Display
Intel Haswell i7-4700MQ CPU
Integrated Intel HD Graphics
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Last edited by mtbrooks33 (2014-12-08 05:37:02)
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I managed to improve performace by setting the acceleration method to UXA in my /etc/X11/xorg.conf.d/20-intel.conf file.
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "uxa"
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