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Graphics performance is now terrible (videos play at ~1 fps, opening Dash is extremely slow etc) on my Dell Latitude E4300 after upgrading to 13.10 (13.04 was fine). The graphics adapter is listed as: " Mobile 4 Series Chipset Integrated Graphics Controller (version 7)".

Any ideas on where to look for the problem?

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    I'm glad to see you have fixed your problem but please don't post the answer as a comment post it as an Answer. You can then accept the answer. This helps other users with a similar problem find it also provides an opportunity for you to earn some reputation.
    – Warren Hill
    Oct 26, 2013 at 10:53
  • @Warren I couldn't due to askubuntu rules (8 hour lockout from asking to answering own question), have moved it now.
    – bainorama
    Oct 27, 2013 at 1:12

1 Answer 1

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For anyone else that runs into this problem, it doesn't appear to have anything to do with the graphics driver, see https://bugs.launchpad.net/ubuntu/+source/policykit-desktop-privileges/+bug/1240336.

To fix, run: sudo pam-auth-update --force

and reboot. This fixes numerous other problems (unable to mount flash drives, no sound, can't run software updater).

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