Security update removes previously working graphics card

[Jack Morrison]

The Ubuntu Trusy repositories have version 331.38-0ubuntu7 which is a working driver for the NVIDIA 820M card.

trust-security updates the driver to 331.113-0ubuntu0.0.4 which removes the support for the 820M.

When attempting to [code]modprobe nvidia-331[/code] with version 331.113 I receive the following message in /var/log/kern.log:

Dec 14 12:26:32 mirror kernel: [23225.879952] pci 0000:04:00.0: Refused to change power state, currently in D0
Dec 14 12:30:26 mirror kernel: [23459.429826] NVRM: The NVIDIA GPU 0000:04:00.0 (PCI ID: 10de:1140)
Dec 14 12:30:26 mirror kernel: [23459.429826] NVRM: installed in this system is not supported by the 331.113
Dec 14 12:30:26 mirror kernel: [23459.429826] NVRM: NVIDIA Linux driver release. Please see 'Appendix
Dec 14 12:30:26 mirror kernel: [23459.429826] NVRM: A - Supported NVIDIA GPU Products' in this release's
Dec 14 12:30:26 mirror kernel: [23459.429826] NVRM: README, available on the Linux driver download page
Dec 14 12:30:26 mirror kernel: [23459.429826] NVRM: at www.nvidia.com.
Dec 14 12:30:26 mirror kernel: [23459.429836] nvidia: probe of 0000:04:00.0 failed with error -1
Dec 14 12:30:26 mirror kernel: [23459.430539] NVRM: The NVIDIA probe routine failed for 1 device(s).
Dec 14 12:30:26 mirror kernel: [23459.430541] NVRM: None of the NVIDIA graphics adapters were initialized!
Dec 14 12:30:26 mirror kernel: [23459.430542] [drm] Module unloaded
Dec 14 12:30:26 mirror kernel: [23459.430630] NVRM: NVIDIA init module failed!

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alberto Milone (albertomilone)]

I'm going to introduce nvidia-340 and nvidia-346. At least the former seems to support your GPU:
http://us.download.nvidia.com/XFree86/Linux-x86_64/340.76/README/supportedchips.html

That should solve your problem.

Sorry for the inconvenience.