Public bug reported:
Description: Ubuntu 12.04 LTS
Release: 12.04
The laptop always locks up when trying to resume after suspend when X is
running on the proprietary NVIDIA drivers.
I installed Precise from scratch on a Thinkpad T420s with NVIDIA
Optimus. The BIOS is configured to "Discrete graphics", i.e. Optimus is
turned off, and the NVIDIA video card is turned on, and it is the only
card visible from Linux.
After the installation, I added the proprietary NVIDIA drivers and
rebooted. This gave me nvidia-current-updates 295.49-0ubuntu0.1
I then suspend the machine, either by closing the lid, hitting Fn+F4,
selecting suspend from the system menu, or running pm-suspend. When I
then resume the machine, either by hitting Fn or by opening the lid, the
LCD backlight comes back on but remains black, and the machine freezes.
After a while, the CPU fan hits max.
I cannot SSH into the machine. There is a link light on the Ethernet,
but no activity light.
This problem persists also with other versions of the NVIDIA driver,
such as nvidia-current 302.17-0ubuntu1~precise~xup1.
The problem disappears if I switch to Integrated Graphics, and use the
intel driver.
I have found no obvious way to get at the syslog or Xorg log files to
get an indication of what or how this locks up.
Details on the packages I tried:
nvidia-current-updates:
Installed: (none)
Candidate: 295.49-0ubuntu0.1
Version table:
295.49-0ubuntu0.1 0
500 http://no.archive.ubuntu.com/ubuntu/ precise-updates/restricted
amd64 Packages
100 /var/lib/dpkg/status
295.40-0ubuntu1 0
500 http://no.archive.ubuntu.com/ubuntu/ precise/restricted amd64
Packages
nvidia-current:
Installed: 302.17-0ubuntu1~precise~xup1
Candidate: 302.17-0ubuntu1~precise~xup1
Version table:
*** 302.17-0ubuntu1~precise~xup1 0
500 http://ppa.launchpad.net/ubuntu-x-swat/x-updates/ubuntu/
precise/main amd64 Packages
100 /var/lib/dpkg/status
295.40-0ubuntu1 0
500 http://no.archive.ubuntu.com/ubuntu/ precise/restricted amd64
Packages
** Affects: nvidia-graphics-drivers (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1015305
Title:
lockup on resume after suspend on T420s
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