Re: staging: udlfb -- staging version does not work, external does

[Bernie Thompson <bernie@plugable.com>]

Pavel,

There are two separate issues you're discussing. Can you check the
lockup issue with the git.plugable.com code?

Thanks,
Bernie

On Sun, Apr 11, 2010 at 9:42 AM, Pavel Machek <pavel@ucw.cz> wrote:
> Hi!
>
>> Thanks for the bug report!
>
> Thanks for trying to solve it :-).
>
>> > (I tried testing with cat /bin/bash > /dev/fb1 and cat /dev/fb0 >
>> > /dev/fb1).
>>
>> I don't think redirects like that will work.  The fbcon module loads
>> against one fb, and can only be switch with utilities like "fbset"
>>
>> > So I tried
>> >
>> >    Roberto De Ioris roberto at unbit.it
>> >    Wed Jun 10 08:00:07 PDT 2009
>>
>> It's good to know Roberto's works. This will be a solvable problem.
>>
>> OK - this may be this bug (fixed at
>> http://git.plugable.com/gitphp/index.php?p=udlfb&a=commit&h=ac7f578b51ce5738386b571d096da4d8889c48e0).
>>  Can you try latest udlfb (git clone
>> http://git.plugable.com/webdav/udlfb ) to see if that's it?
>
> I tried with that patch, no change. dmesg from insmod and cat /dev/fb0
>> /dev/fb1 attempt are:
>
> Apr 11 18:39:02 amd kernel: udlfb: module is from the staging
> directory, the quality is unknown, you have been warned.
> Apr 11 18:39:02 amd kernel: udlfb 1-1:1.0: usb_probe_interface
> Apr 11 18:39:02 amd kernel: udlfb 1-1:1.0: usb_probe_interface - got
> id
> Apr 11 18:39:02 amd kernel: usb 1-1: dlfb: allocated 4 65024 byte urbs
> Apr 11 18:39:02 amd kernel: usb 1-1: dlfb: set_par mode 1024x768
> Apr 11 18:39:02 amd kernel: usb 1-1: dlfb: DisplayLink USB device
> /dev/fb1 attached. 1024x768 resolution. Using 3072K framebuffer memory
> Apr 11 18:39:02 amd kernel: usbcore: registered new interface driver
> udlfb
> Apr 11 18:39:02 amd kernel: VMODES initialized
> Apr 11 18:39:08 amd kernel: usb 1-1: dlfb: open /dev/fb1 user=1
> fb_info=f5087bf0 count=1
> Apr 11 18:39:08 amd kernel: usb 1-1: dlfb: release /dev/fb1 user=1
> count=0
>
> I tried to play with /dev/fb1 a bit more:
>
> root@amd:~# cat /dev/zero > /dev/fb1
> cat: write error: No space left on device
> root@amd:~# cat /dev/fb1
> root@amd:~# echo ahoj > /dev/fb1
> root@amd:~# cat /dev/fb1
> ahoj
> root@amd:~#
>
> ...but still not change on usb connected display, and nothing really
> interesting in dmesg:
>
> Apr 11 18:41:39 amd kernel: usb 1-1: dlfb: open /dev/fb1 user=1
> fb_info=f5087bf0 count=1
> Apr 11 18:41:40 amd kernel: usb 1-1: dlfb: release /dev/fb1 user=1
> count=0
> Apr 11 18:41:46 amd kernel: usb 1-1: dlfb: open /dev/fb1 user=1
> fb_info=f5087bf0 count=1
> Apr 11 18:41:46 amd kernel: usb 1-1: dlfb: release /dev/fb1 user=1
> count=0
> Apr 11 18:41:51 amd kernel: usb 1-1: dlfb: open /dev/fb1 user=1
> fb_info=f5087bf0 count=1
> Apr 11 18:41:51 amd kernel: usb 1-1: dlfb: release /dev/fb1 user=1
> count=0
> Apr 11 18:41:52 amd kernel: usb 1-1: dlfb: open /dev/fb1 user=1
> fb_info=f5087bf0 count=1
> Apr 11 18:41:53 amd kernel: usb 1-1: dlfb: release /dev/fb1 user=1
> count=0
> Apr 11 18:41:59 amd kernel: usb 1-1: dlfb: open /dev/fb1 user=1
> fb_info=f5087bf0 count=1
> Apr 11 18:41:59 amd kernel: usb 1-1: dlfb: release /dev/fb1 user=1
> count=0
> Apr 11 18:42:01 amd kernel: usb 1-1: dlfb: open /dev/fb1 user=1
> fb_info=f5087bf0 count=1
> Apr 11 18:42:01 amd kernel: usb 1-1: dlfb: release /dev/fb1 user=1
> count=0
>
>
> --
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
>