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 : 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 is Solutions:
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
/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
It seems the problem was solved for me by removing Utopic HWE-Stack and downgrading X.org and Kernel to original Trusty version: How to remove Kernel/LTS Enablement Stack?
uname -r returns:
Xorg -version returns:
X.Org X Server 1.15.1 Release Date: 2014-04-13 X Protocol Version 11, Revision 0 Build Operating System: Linux 3.2.0-76-generic x86_64 Ubuntu Current Operating System: Linux nibbler 3.13.0-48-generic #80-Ubuntu SMP Thu Mar 12 11:16:15 UTC 2015 x86_64 Kernel command line: BOOT_IMAGE=/vmlinuz-3.13.0-48-generic root=/dev/mapper/lvmgroup01-ubuntu ro splash quiet vt.handoff=7 Build Date: 12 February 2015 02:49:29PM xorg-server 2:1.15.1-0ubuntu2.7 (For technical support please see http://www.ubuntu.com/support) Current version of pixman: 0.30.2 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version.
I was seeing similar, as well as a few more symptoms.
It looks like this bug:
Note: Use and implement solution 1 because this method fully tested our system.
Thank you 🙂