Comment # 3 on bug 881722 from Wolfgang Bauer

(In reply to Stakanov Schufter from comment #2)
> Yes this is still the case with 13.2 any USB DVB-T stick I tried (in my case
> a Hauppauge Nova-TD and a realtech based zaapa usb-dvb-t. 

Thanks for the feedback.

> The symptoms are as described but I discovered a work around as to say. 
> 
> When you start Kaffeine the first time, then you have the freeze.
> Now close Kaffeine, wait two clicks time (not much more), then click it open
> again.
> Now Kaffeine will work with the dvb-t stick as foreseen and well, the whole
> evening. 
> 
> This is reproducible always, with the new 4.1 kernel as well as with the
> default system kernel. Video always plays well, no problems. 

Ok, then hardware acceleration (libva) is probably not the problem.

Can you still do a few tests please to narrow down the problem?

Does it help to set a different "video driver" (xv or xshm) in
~/.kde4/share/apps/kaffeine/xine-config ?
That should rule out a problem with hardware acceleration completely.

Kaffeine is basically just a frontend to libxine.
So, does it work with xine-ui? You'd have to create a "channels.conf" file
first to be able to watch DVB there though.
You can do it like this:

mkdir ~/.config/xine-lib
dvbscan /usr/share/dvb/dvb-s/Astra-19.2E >~/.config/xine-lib/channels.conf

(the package dvb has to be installed for that, and you have to adapt the first
argument to your circumstances, the preset files are in /usr/share/dvb/dvb-t/
for your use-case obviously)

IME here, xine just crashes with the generated channels.conf. I haven't
investigated further, but it seems to not like some entries (or maybe the list
is just too long... ;-) ).
Deleting all but one line (that looks reasonable) with a text editor in the
resulting file should work in any case.

Does watching TV work with VLC? (menu File->Open Capture Device, Capture
Mode->TV - digital)
Unfortunately, VLC doesn't support scanning for channels either. You have to
enter all values yourself in the dialog.
As I don't use DVB-T myself (only DVB-S) I cannot really help you there though.

> I am writing you on my "new" (stone-age-old AMD 939 and Nvidia G120 with
> nouveau driver) and in this system the very same hauppage does not have the
> freeze. 
> 
> Can this be connected in the way the Intel Chipset "wakes up" the usb-dvb-T
> stick? 

Well, it seems to be related to intel driver somehow then, yes. But I don't
think the graphics driver should interact at all with DVB. But I'm not sure
about all the details there anyway.

Maybe you can try in "recovery mode" to rule out the intel driver?
It might not be related to the kernel driver, but rather the Xorg one...

> Ah, a note, when I open after the workaround on the intel system the
> taskmanager I can observe several instances of kaffeine running.

You mean really several instances of Kaffeine itself?

It is normal that there are two processes, kaffeine and kaffeine-xbu.
But if there are more, than probably Kaffeine is still running (and hanging)
from the first attempt to start it I suppose.