Question

8

14.04 Thinkpad T450: Text getting messed up on large screens

rated 0 times [ 8] [ 0] / answers: 1 / hits: 3940 / 1 Year ago, wed, may 24, 2023, 12:37:22

I am running Ubuntu 14.04 on think-pad T450. When using an external monitor with higher resolution than the in-built laptop screen, the text of dialog boxes are getting messed up.

Looks like I need to replace the Graphic card driver. Anyone found a solution to this?

Updated to add requested information:

lspci -nnk | grep '[03' -A2

gives the following:

00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated

Graphics [8086:1616] (rev 09)

    Subsystem: Lenovo Device [17aa:5034]

Kernel driver in use: i915

Below is a screenshot, see how the letters are messed up on the screen.

Here's a screen shot showing the problem

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fenddy

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4 Years ago

answered 1 Year ago ithriv · Accepted Answer

Thanks all for your support. Luke put me on a track that solved the problem in a easy way. The issue relates to issues using SNA (Sandybridge's New Acceleration) with the Intel Graphics and need to revert back to UXA (Unified Acceleration Architecture). The way to do this is pretty simple:

Put the following:

Section "Device"

   Identifier  "Intel Graphics"

   Driver      "intel"

   Option      "AccelMethod"  "uxa"

EndSection

in file /etc/X11/xorg.conf.d/20-intel.conf, create the directory /etc/X11/xorg.conf.d/ if it does not exist. This must be done as root:

$ sudo mkdir /etc/X11/xorg.conf.d/

$ sudo cp  20-intel.conf /etc/X11/xorg.conf.d/20-intel.conf

Assuming you created the file 20-intel.conf in the local directory.

Hope that help others!

BTW, here's the source for the solution: https://wiki.archlinux.org/index.php/Intel_graphics#SNA_issues