@Alberto - I followed the steps you gave above but the problem remains. It
has made no obvious difference after reboot: system hangs after login with
just the left hand monitor displaying an Ubuntu background.


On Mon, Oct 13, 2014 at 3:04 PM, Alberto Milone <
<email address hidden>> wrote:

> @steveb:
>
> Please follow these steps:
>
> sudo add-apt-repository ppa:canonical-x/x-staging
>
> (say yes to the all the questions)
>
> sudo apt-get update
>
> sudo apt-get install xserver-xorg-video-intel
>
> Remove nvidia:
> sudo apt-get --purge remove nvidia-331 (or nvidia-331-updates, according
> to what you installed)
>
> sudo apt-get install nvidia-331
>
> Restart your computer.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1365695
>
> Title:
>   No longer able to use GUI after update
>
> Status in “nvidia-graphics-drivers-304-updates” package in Ubuntu:
>   Confirmed
> Status in “nvidia-graphics-drivers-331” package in Ubuntu:
>   Confirmed
> Status in “nvidia-graphics-drivers-331-updates” package in Ubuntu:
>   Confirmed
> Status in “ubuntu-drivers-common” package in Ubuntu:
>   Fix Released
> Status in “xserver-xorg-video-intel” package in Ubuntu:
>   Confirmed
> Status in “nvidia-graphics-drivers-304-updates” source package in Trusty:
>   Confirmed
> Status in “nvidia-graphics-drivers-331” source package in Trusty:
>   Confirmed
> Status in “nvidia-graphics-drivers-331-updates” source package in Trusty:
>   Confirmed
> Status in “ubuntu-drivers-common” source package in Trusty:
>   Triaged
> Status in “xserver-xorg-video-intel” source package in Trusty:
>   Incomplete
>
> Bug description:
>   Until yesterday the 14.04 install on this Thinkpad T530 (nvidia
>   Optimus) with nvidia-331 drivers worked just fine, including excellent
>   multi-monitor behavior. Yesterday the set of packages below [1] was
>   updated. I shut down, booted this morning and found out that I was not
>   shown the lightdm login screen: I was stuck at the purple screen that
>   precedes it (into which I enter my disk encryption password).
>
>   Now the funny thing is that I could hear the lightdm startup sound and
>   could actually login by typing my password (disk activity and started
>   processes verify I am actually logged in), but I can't see anything:
>   I'm still stuck at the puple screen.
>
>   Uninstalling the nvidia drivers solved the problem: I'm typing this in
>   a browser window using the nouveau drivers.
>
>   I atttempted switching to nvidia-304, but that doesn't work either.
>   Using those drivers I am shown the lightdm login screen, but after
>   logging in I'm stuck with a screen showing only the background image.
>   Nothing else is available, no keyboard or mouse trickery will reveal
>   any menu, dialog or terminal to gain access.
>
>   Since nouveau doesn't support a multi-monitor setup, it would be great
>   if I someone could tell me how to get the nvidia drivers working
>   again.
>
>   Some things I noticed:
>   - .xsession-errors reported 'Xlib:  extension "GLX" missing on display
> ":0"'
>   - /var/log/Xorg.0.log reported 'setversion 1.4 failed: Permission denied'
>
>   [1] The packages that were updated:
>
>   Start-Date: 2014-09-03  15:07:38
>   Upgrade: libsystemd-login0:amd64 (204-5ubuntu20.4, 204-5ubuntu20.5),
> systemd-services:amd64 (204-5ubuntu20.4, 204-5ubuntu20.5), librbd1:amd64
> (0.80.1-0ubuntu1.1, 0.80.5-0ubuntu0.14.04.1), ubuntu-drivers-common:amd64
> (0.2.91.5, 0.2.91.6), libsystemd-daemon0:amd64 (204-5ubuntu20.4,
> 204-5ubuntu20.5), libgudev-1.0-0:amd64 (204-5ubuntu20.4, 204-5ubuntu20.5),
> libgudev-1.0-0:i386 (204-5ubuntu20.4, 204-5ubuntu20.5),
> libpam-systemd:amd64 (204-5ubuntu20.4, 204-5ubuntu20.5), librados2:amd64
> (0.80.1-0ubuntu1.1, 0.80.5-0ubuntu0.14.04.1), shotwell-common:amd64
> (0.18.0-0ubuntu4.1, 0.18.0-0ubuntu4.2), udev:amd64 (204-5ubuntu20.4,
> 204-5ubuntu20.5), shotwell:amd64 (0.18.0-0ubuntu4.1, 0.18.0-0ubuntu4.2),
> gir1.2-gudev-1.0:amd64 (204-5ubuntu20.4, 204-5ubuntu20.5),
> libudev-dev:amd64 (204-5ubuntu20.4, 204-5ubuntu20.5), libudev1:amd64
> (204-5ubuntu20.4, 204-5ubuntu20.5), libudev1:i386 (204-5ubuntu20.4,
> 204-5ubuntu20.5), xserver-xorg-video-intel:amd64 (2.99.910-0ubuntu1,
> 2.99.910-0ubuntu1.1), libsystemd-journal0:amd64 (204-5ubuntu20.4,
> 204-5ubuntu20.5), rsyslog:amd64 (7.4.4-1ubuntu2, 7.4.4-1ubuntu2.1)
>   End-Date: 2014-09-03  15:08:06
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 14.04
>   Package: nvidia-current-updates (not installed)
>   ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
>   Uname: Linux 3.13.0-35-generic x86_64
>   NonfreeKernelModules: nvidia
>   ApportVersion: 2.14.1-0ubuntu3.3
>   Architecture: amd64
>   CurrentDesktop: Unity
>   Date: Thu Sep  4 22:07:11 2014
>   SourcePackage: nvidia-graphics-drivers-304-updates
>   UpgradeStatus: Upgraded to trusty on 2014-06-03 (93 days ago)
>
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>
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>