KMS:RV635:Radeon 3650HD graphics driver broken on a laptop when connected to a docking station and external display

[Alex Deucher]

On Wed, Jun 2, 2010 at 4:36 PM, Pasi Kärkkäinen <pasik at iki.fi> wrote:
> On Wed, Jun 02, 2010 at 11:15:44PM +0300, Pasi Kärkkäinen wrote:
>> On Wed, Jun 02, 2010 at 03:28:07PM -0400, Alex Deucher wrote:
>> > On Wed, Jun 2, 2010 at 3:12 PM, Pasi Kärkkäinen <pasik at iki.fi> wrote:
>> > > Hello,
>> > >
>> > > If someone wants to take a look at this bug I'd be glad:
>> > >
>> > > "KMS:RV635:Radeon 3650HD graphics driver broken on a laptop when connected to a docking station and external display":
>> > > https://bugzilla.redhat.com/show_bug.cgi?id=593429
>> > >
>> > > I'd like to help debugging it.. let me know what to try, if more information is needed..
>> > > I'm running Fedora 13.
>> > >
>> >
>> > Does it work if you boot up without the external monitor connected and
>> > then enable it after it's booted up?
>> >
>>
>> Ok I just tried this. I booted up the laptop without the dock,
>> and when I was in X using only the laptop internal display I connected
>> the laptop to the docking station (which has external display via DVI).
>>
>> Now I could go to Gnome Monitors application, see the external DVI display,
>> enable it and I got picture there!
>>
>> .. just once. After I disabled the external display, and tried re-enabling it,
>> it didn't work anymore.. no picture on the external display anymore.
>>
>> Also something weird:
>> http://pasik.reaktio.net/fedora/f13-radeon-monitors.jpg
>>
>> The external display is being shown twice.. for some reason?
>>
>> >  Also, is this specific to F13 or
>> > are you seeing similar issues with other kms kernels or distros?
>> >
>>
>> I'll try Ubuntu 10.04.
>>
>> I haven't tried custom/non-distro kernels.
>>
>
> I just tried with Ubuntu 10.04 (kernel 2.6.32) and it fails in a similar way than F13 (kernel 2.6.33) does.
>
> To summarize:
>        - Booting the laptop in the dock, both the internal laptop display and the external DVI display connected,
>          shows the beginning of the boot process on the internal display and then both displays go blank.
>
>        - Booting the laptop in the dock, internal display in use and the external display powered *off*,
>          shows the kernel boot process on the internal display but when GDM should show up the internal display goes blank.
>          Nothing on the external display either (if I power it on).
>
>        - Booting the laptop without the dock (and without the external display) works OK, I can see kernel boot process and GDM/X just OK.
>
>        - Booting the laptop without the dock, and attaching it to the dock after X is running allows me to use (=enable) the external display once.
>          But Gnome Monitor application shows the external display twice (as two devices)..
>

Does it work if you boot with the laptop in the dock and then after it
boots attach the external monitor and enable it?  Do things work any
better if you use xrandr rather than the gnome displays tool?

Alex