Problems with webcamd and RTL2832U
Greg 'groggy' Lehey
grog at FreeBSD.org
Wed Apr 27 08:01:46 UTC 2016
I'm trying to set up MythTV on a 10.2-STABLE system using an RTL2832U
class tuner and webcamd webcamd-4.2.0.9. The tuner probes as:
Apr 27 12:36:40 tiwi devd: Executing 'logger Unknown USB device: vendor 0x0bda product 0x2838 bus uhub0'
Apr 27 12:36:40 tiwi root: Unknown USB device: vendor 0x0bda product 0x2838 bus uhub0
These IDs are mentioned in https://wiki.freebsd.org/WebcamCompat,
along with the comment:
Needs webcamd >= 3.10.0.7; seems to be only a bit less sensitive
than my dib0700 tuners (worse reception in low-signal areas);
remotes not supported yet by the Linux rtl28xxu driver and thus by
webcamd; also supported by the comms/dabstick-radio and
comms/rtl-sdr ports
I run webcamd with the invocation:
webcamd -N RTL2838UHIDIR-Realtek -S 00000001 -M 0 -v 0 -B
This creates the devices:
# ls -lR /dev/dvb/
total 1
dr-xr-xr-x 2 root wheel 512 27 Apr 17:54 adapter0
/dev/dvb/adapter0:
total 0
crw-rw---- 1 webcamd webcamd 0x95 27 Apr 17:54 demux0
crw-rw---- 1 webcamd webcamd 0x96 27 Apr 17:54 dvr0
crw-rw---- 1 webcamd webcamd 0x97 27 Apr 17:54 frontend0
When I run mythtv-setup and try to access the tuner, I get the
messages:
2016-04-27 17:27:43.168109 W DiSEqCDevTree: No device tree for cardid 1
2016-04-27 17:27:57.021513 W DiSEqCDevTree: No device tree for cardid 1
ktrace tells me:
3391 mythtv-setup CALL openat(AT_FDCWD,0x8608eb598,0x2<O_RDWR>,<unused>0)
3391 mythtv-setup NAMI "/dev/dvb/adapter0/frontend0"
3391 mythtv-setup RET _umtx_op -1 errno 60 Operation timed out
...
3391 mythtv-setup CALL write(0x1,0x7fffdfbfb640,0x49)
3391 mythtv-setup GIO fd 1 wrote 73 bytes
"2016-04-27 17:04:39.188786 W DiSEqCDevTree: No device tree for cardid 1
"
3391 mythtv-setup RET write 73/0x49
There's nothing of importance between the attempt to open
/dev/dvb/adapter0/frontend0 and the error message, so clearly that's
the reason for the message, even if it's not quite appropriate.
I don't see any mention of rtl28xxu in current documentation, and no
way to specify a driver in the man page. Can I assume that this is an
undocumented change? Any ideas how to corner the problem?
Greg
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