* problems with several saa7134 cards
@ 2010-12-13 13:45 Artem Bokhan
2010-12-14 13:47 ` Mauro Carvalho Chehab
0 siblings, 1 reply; 2+ messages in thread
From: Artem Bokhan @ 2010-12-13 13:45 UTC (permalink / raw)
To: linux-media
I use several (from three to five) saa7134-based cards on single PC. Currently
I'm trying to migrate from 2.6.22 to 2.6.32 (ubuntu lts).
I've got problems which I did not have with 2.6.22 kernel:
1. Depending on configuration load average holds 1 or 2 when saa7134 module is
loaded. The reason is kernel process "events/".
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
16 root 20 0 0 0 0 S 3 0.0 9:36.89 events/1
15 root 20 0 0 0 0 D 3 0.0 9:35.81 events/0
2. Sound and video are not synced when recording with mencoder.
The same problem with 2.6.36 kernel except "events" process have different name
(can't remember exact name, sorry)
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: problems with several saa7134 cards
2010-12-13 13:45 problems with several saa7134 cards Artem Bokhan
@ 2010-12-14 13:47 ` Mauro Carvalho Chehab
0 siblings, 0 replies; 2+ messages in thread
From: Mauro Carvalho Chehab @ 2010-12-14 13:47 UTC (permalink / raw)
To: Artem Bokhan; +Cc: linux-media
Em 13-12-2010 11:45, Artem Bokhan escreveu:
> I use several (from three to five) saa7134-based cards on single PC. Currently I'm trying to migrate from 2.6.22 to 2.6.32 (ubuntu lts).
>
> I've got problems which I did not have with 2.6.22 kernel:
>
> 1. Depending on configuration load average holds 1 or 2 when saa7134 module is loaded. The reason is kernel process "events/".
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 16 root 20 0 0 0 0 S 3 0.0 9:36.89 events/1
> 15 root 20 0 0 0 0 D 3 0.0 9:35.81 events/0
Probably, it is IR polling. You may disable IR via modprobe parameter:
$ modinfo saa7134|grep ir
parm: disable_ir:disable infrared remote support (int)
Not sure if this parameter is on .32 kernel of if it were added on a newer one.
> 2. Sound and video are not synced when recording with mencoder.
I think that there are some parameters at mencoder to adjust the sync between video
and audio (-delay?). Basically, it needs to delay either audio or video, in order to sync.
The delay time is empiric, as the audio API doesn't provide any way to pass audio
timestamps, currently.
>
>
> The same problem with 2.6.36 kernel except "events" process have different name (can't remember exact name, sorry)
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2010-12-14 13:47 ` Mauro Carvalho Chehab
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