Bug#570490: linux-image-2.6.32-2-amd64: cannot unload radeon with KMS enabled

[Michal Suchanek <hramrach@centrum.cz>]

On 19 February 2010 14:43, Ben Hutchings <ben@decadent.org.uk> wrote:
> On Fri, 2010-02-19 at 09:56 +0100, Michal Suchanek wrote:
>> Package: linux-2.6
>> Version: 2.6.32-8
>> Severity: normal
>>
>>
>> When kms is enabled the radeon module cannot be unloaded. rmmod
>> complains that the module is busy while the X server is not running.
>
> I think this is because the console now depends on the framebuffer
> provided by the video driver.  In theory the video driver could switch
> back to a text mode on exit and the console driver could then be swapped
> to vgacon (or whatever is appropriate) but there is no mechanism for
> this currently.
>
>> This is different from my experience with intel KMS and quite annoying.
>
> Why is this a problem?
>

Because KMS does not seem to work well for me so a mechanism for
switching it off other than rebooting would come handy at times.

Of course, I can always edit my startup scripts to not enable it and
reboot. Not enabling it in startup scripts is not an option since X
fails in KMS mode unless the module is manually preloaded.

Thanks

Michal