Comment 18 for bug 1412602

Sorry to take so long getting back to this. The affected PC is usually used as my media center but I've now been able to move it into my testing suite so hopefully once 14.04.2 milestone testing is out of the way I'll be able to respond more quickly and efficiently.

Regarding the screen corruption in Utopic I've now found that it does eventually occur even running GNOME Classic but just much less frequently than in a GNOME Shell session. This includes both the stock Utopic kernel as well as the 3.16.7-031607-generic kernel Joseph Salisbury requested I try.

So, moving on to Vivid for the moment - last night I installed Ubuntu GNOME Vivid Alpha 2 and this AM I booted it using the nouveau.config=NvMSI=0 boot parameter, then applied all available updates, and it seems to be running GNOME Shell just fine with the latest Vivid kernel using the nouveau driver:

lance@lance-AMD-desktop:~$ uname -r
3.18.0-13-generic

lance@lance-AMD-desktop:~$ sudo lshw -c video
[sudo] password for lance:
  *-display
       description: VGA compatible controller
       product: C61 [GeForce 7025 / nForce 630a]
       vendor: NVIDIA Corporation
       physical id: d
       bus info: pci@0000:00:0d.0
       version: a2
       width: 64 bits
       clock: 66MHz
       capabilities: pm msi vga_controller bus_master cap_list rom
       configuration: driver=nouveau latency=0
       resources: irq:21 memory:fb000000-fbffffff memory:e0000000-efffffff memory:fc000000-fcffffff memory:80000000-8001ffff

So some recent kernel update in Vivid appears to have fixed this issue. Is there still any point in trying the 3.18.5-031805-generic mainline kernel?

For the next 5 or 6 days I'll be shifting my focus almost totally onto 14.04.2, in fact my next two tests on this hardware will be 14.04.1 with the latest Trusty kernel and then 14.04.2 with the Utopic HWE.