I might have a problem with Ubuntu 14.04 with a brand new laptop Lenovo T450s - it looks like a virus. It appeared after the laptop had to be restarted and I hope it is just some corrupted file.

Anti-virus did not find anything.

So it looks like some letters are replaced with random new letters or they're just missing. It appears with different intensity after restart, but does not disappear. It affects the GUI and also Firefox, synaptic and other programs, but not all. Skype is fine, terminal is fine. It appears even under the guest session.

Is it a virus? If yes which anti-virus for Ubuntu can find it and if not how to fix it?

Here is the screenshot:

enter image description here

olga@olga:~$ sudo lshw -class display
[sudo] password for olga: 
       description: VGA compatible controller
       product: Broadwell-U Integrated Graphics
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:61 memory:e0000000-e0ffffff memory:d0000000-dfffffff ioport:3000(size=64)
  • Your picture isn't visible. Try opening up it's sharing settings - or putting it somewhere non-FB users can see it. Virus is unlikely - font or video driver? Apr 9, 2015 at 16:07
  • 1
    As @MarkWilliams says. Please help us help you by uploading the image to imgur.com and editing your question to remove the old and add the new link so that we can see it. thank you!
    – Elder Geek
    Apr 9, 2015 at 16:10
  • 1
    Please upload the picture in imgur.com put the link in by editing your question.
    – user68186
    Apr 9, 2015 at 16:23
  • i.imgur.com/WvSoNJM.png - here is the picture. Is it now visible? Apr 10, 2015 at 5:46
  • 1
    Please edit your question and provide the output of sudo lshw -class display
    – Elder Geek
    Apr 10, 2015 at 13:06

1 Answer 1


This being caused by a virus is very unlikely.

I have the same problem, also Ubuntu 14.04 on Thinkpad T450s, and the following workaround that someone suggested on Launchpad works for me, although it has a noticeable negative impact on graphics performance:

sudo mkdir /etc/X11/xorg.conf.d/
sudo -H gedit /etc/X11/xorg.conf.d/20-intel.conf

Add the following to the file, save it and reboot:

Section "Device"
  Identifier  "Intel Graphics"
  Driver      "intel"
  Option      "AccelMethod"  "uxa"
  • Thanks, seems like it is working and hopefully will not come back. Apr 15, 2015 at 8:24

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