[mythtv-users] UDEV rules

[Daryl McDonald]

On Tue, Jan 28, 2014 at 3:32 AM, Yianni <yiannividalis at hotmail.com> wrote:
>> MY bad, The rules I have in place are:
>> KERNEL=="video[0-9]", ATTR{name}=="ivtv[0-1] encoder MPG",
>> ATTRS{subsystem_device}=="0x8801",SYMLINK+="videopvr150",GROUP="video"
>> KERNEL=="video[0-9]", ATTR{name}=="saa7133[0] video (Kworld PC150-",
>> ATTRS{subsystem_device}=="0xa135",SYMLINK+="videoKWd150",GROUP="video"
>> KERNEL=="video[0-9]", ATTR{name}=="Hauppauge WinTV-HVR1250 (video)",
>> ATTRS{subsystem_device}=="0x7911",SYMLINK+="videoHP1250",GROUP="video"
>> KERNEL=="dvb?.frontend?",SUBSYSTEM=="dvb",ATTRS{subsystem_vendor}=="0x0070",ATTRS{subsystem_device}=="0x7911",SYMLINK+="dvbHP1250",GROUP="video"
>> KERNEL=="dvb?.frontend?",SUBSYSTEM=="dvb",ATTRS{subsystem_vendor}=="0x17de",ATTRS{subsystem_device}=="0xa135",SYMLINK+="dvbKWd150",GROUP="video"
>>
>> Which results in:
>> daryl at daryl-A780L3C:~$ ls -lah /dev/video*
>> crw-rw----+ 1 root video 81, 0 Jan 27 15:18 /dev/video0
>> crw-rw----+ 1 root video 81, 5 Jan 27 15:18 /dev/video1
>> crw-rw----+ 1 root video 81, 7 Jan 27 15:18 /dev/video2
>> crw-rw----+ 1 root video 81, 3 Jan 27 15:18 /dev/video24
>> crw-rw----+ 1 root video 81, 1 Jan 27 15:18 /dev/video32
>> lrwxrwxrwx 1 root root 6 Jan 27 15:18 /dev/videoHP1250 -> video1
>> lrwxrwxrwx 1 root root 6 Jan 27 15:18 /dev/videopvr150 -> video0
>> daryl at daryl-A780L3C:~$ ls -lah /dev/dvb*
>> lrwxrwxrwx 1 root root 22 Jan 27 15:18 /dev/dvbHP1250 -> dvb/adapter0/frontend0
>> lrwxrwxrwx 1 root root 22 Jan 27 15:18 /dev/dvbKWd150 -> dvb/adapter1/frontend0
>>
>> /dev/dvb:
>> total 0
>> drwxr-xr-x 4 root root 80 Jan 27 15:18 .
>> drwxr-xr-x 16 root root 4.6K Jan 27 15:18 ..
>> drwxr-xr-x 2 root root 120 Jan 27 15:18 adapter0
>> drwxr-xr-x 2 root root 120 Jan 27 15:18 adapter1
>> daryl at daryl-A780L3C:~$
>>
>> And all that looks good except for no "dvbKWd150" symlink
>> Daryl
>
> Hi, Daryl
>
> Since there is a /dev/dvbKWd150 -> dvb/adapter1/frontend0 symlink, I assume you mean there's not a videoKWd150 symlink.
>
>
> I'd like to suggest some things regarding the udev rules you have.
>
> - You'd better keep each rule in one line, and not spanned across 2 or three.
>
> KERNEL=="video[0-9]", ATTR{name}=="ivtv[0-1] encoder MPG",ATTRS{subsystem_device}=="0x8801",SYMLINK+="videopvr150",GROUP="video"
> KERNEL=="video[0-9]", ATTR{name}=="saa7133[0] video (Kworld PC150-",ATTRS{subsystem_device}=="0xa135",SYMLINK+="videoKWd150",GROUP="video"
> KERNEL=="video[0-9]", ATTR{name}=="Hauppauge WinTV-HVR1250 (video)",ATTRS{subsystem_device}=="0x7911",SYMLINK+="videoHP1250",GROUP="video"
> KERNEL=="dvb?.frontend?",SUBSYSTEM=="dvb",ATTRS{subsystem_vendor}=="0x0070",ATTRS{subsystem_device}=="0x7911",SYMLINK+="dvbHP1250",GROUP="video"
> KERNEL=="dvb?.frontend?",SUBSYSTEM=="dvb",ATTRS{subsystem_vendor}=="0x17de",ATTRS{subsystem_device}=="0xa135",SYMLINK+="dvbKWd150",GROUP="video"
>
> - The ATTR{name} for the cards is dynamically given by udev or by the kernel and in the case of the ivtv it contains the device number (ivtv0)
> Because the analog saa7133 uses brackets in it's name, you have to follow Hika's advice (Post #96), i.e the rule will become:
>
> KERNEL=="video[0-9]", ATTR{name}=="saa7133\[0\] video (Kworld PC150-",ATTRS{subsystem_device}=="0xa135",SYMLINK+="videoKWd150",GROUP="video"
>
> or
> KERNEL=="video[0-9]", ATTR{name}=="saa7133??? video ?Kworld PC150-",ATTRS{subsystem_device}=="0xa135",SYMLINK+="videoKWd150",GROUP="video"
>
> which is more flexible.
>
> Hoping we're not drowing you in too much advice, and trying to group the symlinks:
>  - analog as video*
>  - digital under /dev/dvb as adapter*,
>
> I suggest using:
>
> KERNEL=="video[0-9]", ATTR{name}=="ivtv[0-1] encoder MPG",ATTRS{subsystem_device}=="0x8801",SYMLINK+="videopvr150",GROUP="video"
> KERNEL=="video[0-9]", ATTR{name}=="saa7133??? video ?Kworld PC150-",ATTRS{subsystem_device}=="0xa135",SYMLINK+="videoKWd150",GROUP="video"
> KERNEL=="video[0-9]", ATTR{name}=="Hauppauge WinTV-HVR1250 (video)",ATTRS{subsystem_device}=="0x7911",SYMLINK+="videoHP1250",GROUP="video"
> KERNEL=="dvb?.frontend?",SUBSYSTEM=="dvb",ATTRS{subsystem_vendor}=="0x0070",ATTRS{subsystem_device}=="0x7911",SYMLINK+="dvb/adapterHP1250",GROUP="video"
> KERNEL=="dvb?.frontend?",SUBSYSTEM=="dvb",ATTRS{subsystem_vendor}=="0x17de",ATTRS{subsystem_device}=="0xa135",SYMLINK+="dvb/adapterKWd150",GROUP="video"
>
> Until next time ;)
>
> Yianni.
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I did find success with Hika's suggestion, my interpretation was to
replace "[0]" with "?0?", which created the missing link.

I refuse to drown, these are just swimming lessons, and all direction
is greatly appreciated.    Daryl