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

[Pavel Machek]

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


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