[Libdlo] Multiple devices

[Kal McFate]

Here is the initialization log. The interesting line is the conflicting fb
hw usage line.

[   12.221949] usb 2-5: dlfb: allocated 4 65024 byte urbs
[   12.310385] usb 2-5: dlfb: set_par mode 1280x1024
[   12.314496] usb 2-5: dlfb: DisplayLink USB device /dev/fb0 attached.
1280x1024 resolution. Using 5120K framebuffer memory
[   12.314618] usb 2-6: dlfb: allocated 4 65024 byte urbs
[   12.318749] usb 2-5: dlfb: open /dev/fb0 user=0 fb_info=f3ade800 count=1
[   12.319455] usb 2-5: dlfb: set_par mode 1280x1024
[   12.327923] usb 2-5: dlfb: set_par mode 1280x1024
[   12.361923] usb 2-5: dlfb: open /dev/fb0 user=1 fb_info=f3ade800 count=2
[   12.404061] usb 2-6: dlfb: set_par mode 1280x1024
[   12.407554] fb: conflicting fb hw usage udlfb vs udlfb - removing generic
driver
[   12.407797] usb 2-5: dlfb: release /dev/fb0 user=0 count=1
[   12.408771] usb 2-6: dlfb: open /dev/fb0 user=0 fb_info=f6b0b800 count=1
[   12.409534] usb 2-6: dlfb: set_par mode 1280x1024
[   12.421552] usb 2-6: dlfb: set_par mode 1280x1024
[   12.424772] usb 2-6: dlfb: DisplayLink USB device /dev/fb0 attached.
1280x1024 resolution. Using 5120K framebuffer memory
[   12.424958] usbcore: registered new interface driver udlfb
[   12.426595] usb 2-6: dlfb: set_par mode 1280x1024
[   12.957428] usb 2-6: dlfb: set_par mode 1280x1024


On Wed, Mar 17, 2010 at 12:37 PM, Bernie Thompson <bernie at plugable.com>wrote:

> Hi Kal,
>
> I've not seen this, and the setups here are all configured for
> multiseat with several DisplayLink devices each.
>
> Can you check out /var/log/kern.log and see if there are any clues
> there?  Kernel oops or dlfb messages?
>
> Thanks,
> Bernie
>
> On Wed, Mar 17, 2010 at 10:28 AM, Kal McFate <kmcfate at darkink.com> wrote:
> > From my experience the udlfb module from git causes problems if you have
> > more than on displaylink device. It will clobber the first /dev/fb?
> device
> > and re-allocate it to subsequent devices. This ends up with just a single
> fb
> > device. The 0.2.3 release correctly creates multiple /dev/fb devices.
> >
> > Anyone else seeing this or have any suggestions?
> >
> > _______________________________________________
> > Libdlo mailing list
> > Libdlo at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/libdlo
> >
> >
>



-- 
Kal McFate | Operations Engineer | The Rackspace Cloud | 210-415-1546
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