[pvrusb2] cx25840 video scaler is broken [was: Poor analog picture on HVR-1950 after upgrade...]

[Roger]

On Sun, 2009-06-14 at 21:22 -0500, Mike Isely wrote:
> On Sun, 14 Jun 2009, Roger wrote:
> > Never knew about this site either.  Isn't much use except noting the fact,
> > "using mythtv-setup as user instead of root" will spawn errors when accessing
> > /dev/video0 for the HVR-1950.
> 
> That note is not entirely correct, at least probably in how you quoted 
> it.  The UID one uses to access /dev/video0 depends on how the device 
> node has been set up by udev in your distro.  It has nothing to do with 
> the driver, and it ESPECIALLY has nothing to do with the hardware 
> sitting on the other side of the driver.
> 
> Generally unless a distro does something special here, e.g. configure 
> udev to assign group "video" to all V4L & DVB device nodes, then root is 
> the only thing that can really do anything here.  But a better approach 
> is to assign a specific group to the node, e.g. 'video'.  Then any user 
> associated with that group can have greater access (usually full 
> access).  It's just a question of uid, gid associated with the node and 
> whatever mode bits have been set - none of which has anything at all to 
> do with the underlying driver or its hardware.

This is exactly what I thought too.  However,

$ ls -alh /dev/video?
crw-rw---- 1 root video 81, 0 Jun 13 15:05 /dev/video0
crw-rw---- 1 root video 81, 2 Jun 13 15:05 /dev/video1

$ cat /etc/group |grep video
video:x:27:root,roger,mythtv


Executing mythtv-setup as root has no effect here -- after stopping the
backend (with the conflicting EIT scan).

I still get the multiple "Card 3 (type Could not open '/dev/video1' to )
is set to start on channel  Please add, which does not exist." errors on
mythtv-setup exit. 

Guess this guy's theory isn't correct. :-/


-- 
Roger
http://rogerx.freeshell.org