[linux-dvb] Re: Problems with Hauppauge Nova-T and dvb-kernelcvs

[Seppo Ingalsuo <seppo.ingalsuo@iki.fi>]

Thanks Torsten and Andrew. Here is more some information.

Andrew de Quincey wrote:

> On Thursday 02 Dec 2004 16:59, Seppo Ingalsuo wrote:
>  
> > Hi,
> >
> > My dvb-t card is Hauppauge Nova-T. I first noticed the problems with
> > plain linux 2.6.9 kernel. Channel switching between DVB-T muxes
> > (different frequency) takes very long time. This causes annoying
> > restarts in vdr and missed beginnings in recordings. In old kernels
> > there were long delays (e.g. 2.6.8.1) but I didn't notice failures in
> > recordings.
> >    
> Were you using the kernel-supplied drivers in 2.6.8.1 and 2.6.9? I have just 
> compared them - and there are no differences between the (DVB) code that 
> could cause this.
>  
Both were from unmodified kernel source. My feeling about the difference 
is then wrong. At the same time I upgraded from vdr 1.3.14 to vdr 1.3.15 
which could perhaps be the reason. I'm much more confident about 
difference between 2.6.9 and fresh cvs.

> Please try Torsten's suggestion and let us know if it helps... Also, enabling 
> the "frontend_debug=1" on the dvb-core module should show what is happening.
>  
Torsten's suggestion seemed to improve a bit zapping with 2.6.9 dvb 
drivers. Channel switch times were ~1s .. ~10s. I don't remember 
getting  ~1s channel switch times for changed frequency never before. 
Dvbscan also worked perfectly. I'll use now plain 2.6.9 drivers instead 
of cvs because of next problems:

Next I unloaded 2.6.9 drivers and loaded cvs drivers. Tzap got 
constantly exceptionally fast lock always within 1-2s (this is budget 
card so I didn't check if live video would have worked). Then I got 
kernel panic and had to restart (not normal in my EPIA based vdr box,  I 
didn't record the output in console). Next I tested with vdr 1.3.15

Dec  3 10:48:33 napsu vdr[1924]: switching to channel 3
Dec  3 10:48:33 napsu vdr[1933]: transfer thread ended (pid=1933, 
tid=114696)
Dec  3 10:48:33 napsu vdr[1924]: buffer stats: 128216 (6%) used
Dec  3 10:48:38 napsu vdr[1924]: ERROR: device 1 has no lock, can't 
attach receiver!

The same part from kern.log

Dec  3 10:48:33 napsu last message repeated 3 times
Dec  3 10:48:33 napsu kernel: dvb_frontend_ioctl
Dec  3 10:48:33 napsu kernel: dvb_frontend_get_event
Dec  3 10:48:33 napsu kernel: dvb_frontend_ioctl
Dec  3 10:48:33 napsu kernel: dvb_frontend_add_event
Dec  3 10:48:33 napsu kernel: dvb_frontend_autotune: drift:0 bending:0 
inversion:0 auto_step:0 auto_sub_step:0 started_auto_step:0
Dec  3 10:48:33 napsu kernel: dvb_frontend_poll
Dec  3 10:48:33 napsu kernel: dvb_frontend_ioctl
Dec  3 10:48:33 napsu kernel: dvb_frontend_get_event
Dec  3 10:48:33 napsu kernel: dvb_frontend_poll
Dec  3 10:48:34 napsu last message repeated 146 times
Dec  3 10:48:34 napsu kernel: dvb_frontend_add_event
Dec  3 10:48:34 napsu kernel: dvb_frontend_autotune: drift:166667 
bending:0 inversion:0 auto_step:1 auto_sub_step:0 started_auto_step:0
Dec  3 10:48:34 napsu kernel: dvb_frontend_poll
Dec  3 10:48:34 napsu kernel: dvb_frontend_ioctl
Dec  3 10:48:34 napsu kernel: dvb_frontend_get_event
Dec  3 10:48:34 napsu kernel: dvb_frontend_poll
Dec  3 10:48:35 napsu last message repeated 146 times
Dec  3 10:48:35 napsu kernel: dvb_frontend_add_event
Dec  3 10:48:35 napsu kernel: dvb_frontend_autotune: drift:-166667 
bending:0 inversion:0 auto_step:1 auto_sub_step:2 started_auto_step:0
Dec  3 10:48:35 napsu kernel: dvb_frontend_poll
Dec  3 10:48:35 napsu kernel: dvb_frontend_ioctl
Dec  3 10:48:35 napsu kernel: dvb_frontend_get_event
Dec  3 10:48:35 napsu kernel: dvb_frontend_poll
Dec  3 10:48:36 napsu last message repeated 146 times
Dec  3 10:48:36 napsu kernel: dvb_frontend_autotune: drift:333334 
bending:0 inversion:0 auto_step:2 auto_sub_step:0 started_auto_step:0
Dec  3 10:48:36 napsu kernel: dvb_frontend_poll
Dec  3 10:48:37 napsu last message repeated 151 times
Dec  3 10:48:37 napsu kernel: dvb_frontend_autotune: drift:-333334 
bending:0 inversion:0 auto_step:2 auto_sub_step:2 started_auto_step:0
Dec  3 10:48:37 napsu kernel: dvb_frontend_poll
Dec  3 10:48:38 napsu last message repeated 299 times
Dec  3 10:48:38 napsu kernel: update_delay
Dec  3 10:48:38 napsu kernel: dvb_frontend_autotune: drift:0 bending:0 
inversion:0 auto_step:0 auto_sub_step:0 started_auto_step:0
Dec  3 10:48:38 napsu kernel: dvb_frontend_poll
Dec  3 10:48:40 napsu last message repeated 225 times

First tuning to a changed mux seem to fail always. If I changed next 
channel within same mux zapping was succesfull

Dec  3 10:49:17 napsu vdr[1924]: switching to channel 4
Dec  3 10:49:17 napsu vdr[1938]: transfer thread ended (pid=1938, 
tid=180232)
Dec  3 10:49:17 napsu vdr[1924]: buffer stats: 0 (0%) used
Dec  3 10:49:17 napsu vdr[1939]: transfer thread started (pid=1939, 
tid=196616)
Dec  3 10:49:17 napsu vdr[1940]: receiver on device 1 thread started 
(pid=1940, tid=213001)
Dec  3 10:49:17 napsu vdr[1941]: TS buffer on device 1 thread started 
(pid=1941, tid=229386)

Dec  3 10:49:17 napsu kernel: update_delay
Dec  3 10:49:17 napsu kernel: dvb_frontend_poll
Dec  3 10:49:18 napsu last message repeated 3 times

Then again mux change

Dec  3 10:49:29 napsu vdr[1924]: switching to channel 1
Dec  3 10:49:29 napsu vdr[1942]: transfer thread ended (pid=1942, 
tid=245768)
Dec  3 10:49:30 napsu vdr[1944]: TS buffer on device 1 thread ended 
(pid=1944, tid=278538)
Dec  3 10:49:30 napsu vdr[1943]: buffer stats: 73508 (3%) used
Dec  3 10:49:30 napsu vdr[1943]: receiver on device 1 thread ended 
(pid=1943, tid=262153)
Dec  3 10:49:30 napsu vdr[1924]: buffer stats: 73884 (3%) used
Dec  3 10:49:35 napsu vdr[1924]: ERROR: device 1 has no lock, can't 
attach receiver!
Dec  3 10:49:36 napsu vdr[1946]: receiver on device 1 thread started 
(pid=1946, tid=311305)
Dec  3 10:49:36 napsu vdr[1947]: TS buffer on device 1 thread started 
(pid=1947, tid=327690)
Dec  3 10:49:36 napsu vdr[1924]: max. latency time 7 seconds
Dec  3 10:49:36 napsu vdr[1948]: transfer thread started (pid=1948, 
tid=344075)

Dec  3 10:49:30 napsu kernel: dvb_frontend_ioctl
Dec  3 10:49:30 napsu kernel: dvb_frontend_get_event
Dec  3 10:49:30 napsu kernel: dvb_frontend_poll
Dec  3 10:49:30 napsu kernel: dvb_frontend_autotune: drift:0 bending:0 
inversion:0 auto_step:0 auto_sub_step:0 started_auto_step:0
Dec  3 10:49:30 napsu kernel: dvb_frontend_poll
Dec  3 10:49:31 napsu last message repeated 151 times
Dec  3 10:49:31 napsu kernel: dvb_frontend_add_event
Dec  3 10:49:31 napsu kernel: dvb_frontend_autotune: drift:166667 
bending:0 inversion:0 auto_step:1 auto_sub_step:0 started_auto_step:0
Dec  3 10:49:31 napsu kernel: dvb_frontend_poll
Dec  3 10:49:31 napsu kernel: dvb_frontend_ioctl
Dec  3 10:49:31 napsu kernel: dvb_frontend_get_event
Dec  3 10:49:31 napsu kernel: dvb_frontend_poll
Dec  3 10:49:31 napsu last message repeated 146 times
Dec  3 10:49:31 napsu kernel: dvb_frontend_add_event
Dec  3 10:49:31 napsu kernel: dvb_frontend_autotune: drift:-166667 
bending:0 inversion:0 auto_step:1 auto_sub_step:2 started_auto_step:0
Dec  3 10:49:31 napsu kernel: dvb_frontend_poll
Dec  3 10:49:31 napsu kernel: dvb_frontend_ioctl
Dec  3 10:49:31 napsu kernel: dvb_frontend_get_event
Dec  3 10:49:31 napsu kernel: dvb_frontend_poll
Dec  3 10:49:32 napsu last message repeated 146 times
Dec  3 10:49:32 napsu kernel: dvb_frontend_autotune: drift:333334 
bending:0 inversion:0 auto_step:2 auto_sub_step:0 started_auto_step:0
Dec  3 10:49:32 napsu kernel: dvb_frontend_poll
Dec  3 10:49:33 napsu last message repeated 151 times
Dec  3 10:49:33 napsu kernel: dvb_frontend_autotune: drift:-333334 
bending:0 inversion:0 auto_step:2 auto_sub_step:2 started_auto_step:0
Dec  3 10:49:33 napsu kernel: dvb_frontend_poll
Dec  3 10:49:35 napsu last message repeated 299 times
Dec  3 10:49:35 napsu kernel: update_delay
Dec  3 10:49:35 napsu kernel: dvb_frontend_autotune: drift:0 bending:0 
inversion:0 auto_step:0 auto_sub_step:0 started_auto_step:0
Dec  3 10:49:35 napsu kernel: dvb_frontend_poll
Dec  3 10:49:36 napsu last message repeated 233 times
Dec  3 10:49:36 napsu kernel: dvb_frontend_add_event
Dec  3 10:49:36 napsu kernel: dvb_frontend_poll
Dec  3 10:49:36 napsu kernel: dvb_frontend_poll
Dec  3 10:49:36 napsu kernel: update_delay
Dec  3 10:49:36 napsu kernel: dvb_frontend_poll
Dec  3 10:49:36 napsu kernel: dvb_frontend_ioctl
Dec  3 10:49:36 napsu kernel: dvb_frontend_get_event
Dec  3 10:49:36 napsu kernel: dvb_frontend_poll
Dec  3 10:49:37 napsu last message repeated 3 times