** Also affects: ubuntu-drivers-common (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: ubuntu-drivers-common (Ubuntu)
Status: Fix Committed => Fix Released
** Changed in: ubuntu-drivers-common (Ubuntu Trusty)
Status: New => In Progress
** Changed in: ubuntu-drivers-common (Ubuntu Trusty)
Importance: Undecided => Medium
** Changed in: ubuntu-drivers-common (Ubuntu Trusty)
Assignee: (unassigned) => Alberto Milone (albertomilone)
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https://bugs.launchpad.net/bugs/1337357
Title:
gpu-manager searches for a wrong string when checking if nvidia was
unloaded
Status in “ubuntu-drivers-common” package in Ubuntu:
Fix Released
Status in “ubuntu-drivers-common” source package in Trusty:
In Progress
Bug description:
I am using Ubuntu 14.04 with an Intel 4000HD and Nvidia GTX 770.
I have noticed that my gpu-manager claims that:
Was nvidia unloaded? yes
even though the nvidia module is loaded and was never unloaded (and lsmod
displays it).
Quick investigation showed that gpu-manager checks whether that module was
unloaded by running:
dmesg | grep -q "nvidia: module"
I assume that the intention was to detect any "nvidia: module unloaded" or
similar messages.
However, my dmesg contains several other messages that match this pattern:
nvidia: module license 'NVIDIA' taints kernel.
nvidia: module verification failed: signature and/or required key
missing - tainting kernel
These messages are not realated to unloading the module, it sucessfully keeps
running afterwards.
Therefore I believe the pattern used by gpu-manager is incorrect.
Possible solution is to correct that search string. The only message that
appears in my dmesg when I unload nvidia module is:
[drm] Module unloaded
The dmesg output never explicitly names `nvidia` when it is unloaded.
Another possible solution would be to grep lsmod instead of dmesg, to check
if the driver is currently loaded.
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