On Mon, 29 Jun 2009, Andy Walls wrote:
According to the V4L2 specification for the close() call, all devices
should remember their settings.
There have been recent discussions on devices that do power management
not saving the RF tuner freq after the final close() (and what to do
about it), but the last input and standard should be preserved. (Note,
I have not looked at the usbvision driver to look for problems.)
It would appear that the usbvision driver isn't following the spec. As I
mentioned in my earlier message, there is an LED which indicates that the
box is active. Under windows this comes on and stays on after the first
use, until reboot. Under linux it always goes off when the programme using
the device exits.
What precise WinTV USB device/verision are you using?
From lsusb :
Bus 002 Device 002: ID 0573:4d22 Zoran Co. Personal Media Division
(Nogatech) Hauppauge WinTV-USB II (PAL) Model 566
Try something like:
$ v4l2-ctl --help
$ v4l2-ctl -d /dev/video0 --log-status
$ v4l2-ctl -d /dev/video0 --list-inputs
$ v4l2-ctl -d /dev/video0 --set-input=2
$ v4l2-ctl -d /dev/video0 --log-status
[root@saucy ~]# v4l2-ctl -d /dev/video0 --log-status
[root@saucy ~]# v4l2-ctl -d /dev/video0 --list-inputs
ioctl: VIDIOC_ENUMINPUT
Input : 0
Name : Television
Type : 0x00000001
Audioset: 0x00000001
Tuner : 0x00000000
Standard: 0x0000000000FFB1FF ( PAL NTSC SECAM )
Status : 0
Input : 1
Name : Composite Video Input
Type : 0x00000002
Audioset: 0x00000000
Tuner : 0x00000000
Standard: 0x00000000000000FF ( PAL )
Status : 0
Input : 2
Name : S-Video Input
Type : 0x00000002
Audioset: 0x00000000
Tuner : 0x00000000
Standard: 0x00000000000000FF ( PAL )
Status : 0
[root@saucy ~]# v4l2-ctl -d /dev/video0 --set-input=2
Video input set to 2 (S-Video Input)
[root@saucy ~]# v4l2-ctl -d /dev/video0 --log-status
[root@saucy ~]#
Each of these commands causes the following messages to be repeated in
/var/log/messages
Jun 29 13:43:06 saucy kernel: saa7115' 1-0025: saa7113 found
(1f7113d0e100000) @ 0x4a (usbvision #0)
Jun 29 13:43:08 saucy kernel: tuner' 1-0061: chip found @ 0xc2 (usbvision
#0)
Jun 29 13:43:08 saucy kernel: tuner-simple 1-0061: creating new instance
Jun 29 13:43:08 saucy kernel: tuner-simple 1-0061: type set to 5 (Philips
PAL_BG (FI1216 and compatibles))
Jun 29 13:43:12 saucy kernel: tuner-simple 1-0061: destroying instance
I'm currently using kernel 2.6.27.21-desktop-1mnb on Mandriva 2009.0.
Tim W
--
Tim Williams BSc MSc MBCS
Euromotor Autotrain LLP
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Priory Road
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Tel : +44 (0)121 414 2214
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number: OC317070.
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