Hello,
I have the same problem with a Hauppauge WinTV PVR card (bt878 with
radio).
Since 2.6.39.x radio is broken => No Frequency range :
v4l2-ctl -d /dev/radio0 --all -L
kernel 2.6.32.x:
----------------
Driver Info (not using libv4l2):
Driver name : bttv
Card type : BT878 radio (Hauppauge WinTV PV
Bus info : PCI:0000:02:0a.0
Driver version: 0.9.18
Capabilities : 0x00010000
Tuner
Video input : 0 (Radio: ok)
Audio input : 0 (Radio)
Frequency: 0 (0.000000 MHz)
Tuner:
Name : Radio
Capabilities : 62.5 Hz stereo
Frequency range : 65.0 MHz - 108.0 MHz
Signal strength/AFC : 13%/0
Current audio mode : stereo
Available subchannels: mono
mute (bool) : default=0 value=1
kernel 2.6.38.x:
----------------
Driver Info (not using libv4l2):
Driver name : bttv
Card type : BT878 radio (Hauppauge WinTV PV
Bus info : PCI:0000:02:0a.0
Driver version: 0.9.18
Capabilities : 0x00010000
Tuner
Video input : 0 (Radio: ok)
Audio input : 0 (Radio)
Frequency: 0 (0.000000 MHz)
Tuner:
Name : Radio
Capabilities : 62.5 Hz stereo
Frequency range : 65.0 MHz - 108.0 MHz
Signal strength/AFC : 0%/0
Current audio mode : stereo
Available subchannels: mono
mute (bool) : default=0 value=1
kernel 3.0.x:
----------------
Driver Info (not using libv4l2):
Driver name : bttv
Card type : BT878 radio (Hauppauge WinTV PV
Bus info : PCI:0000:02:0a.0
Driver version: 0.9.18
Capabilities : 0x00010000
Tuner
Video input : 0 (Radio: ok)
Audio input : 0 (Radio)
Frequency: 0 (0.000000 MHz)
Tuner:
Name : Radio
Capabilities : 62.5 kHz
Frequency range : 0.0 MHz - 0.0 MHz
Signal strength/AFC : 0%/0
Current audio mode : mono
Available subchannels:
mute (bool) : default=0 value=1
3.2:
-----
Driver Info (not using libv4l2):
Driver name : bttv
Card type : BT878 radio (Hauppauge WinTV PV
Bus info : PCI:0000:02:0a.0
Driver version: 3.2.27
Capabilities : 0x00010000
Tuner
Video input : 0 (Radio: ok)
Audio input : 0 (Radio)
Frequency: 0 (0.000000 MHz)
Tuner:
Name : Radio
Capabilities : 62.5 kHz
Frequency range : 0.0 MHz - 0.0 MHz
Signal strength/AFC : 0%/0
Current audio mode : mono
Available subchannels:
mute (bool) : default=0 value=1
I will test it with the quantal kernel (3.5.x) too, which is also
available in proposed under precise.
Udo Steinberg bisected the commit:
Link and message: https://lkml.org/lkml/2011/11/11/257
I've bisected the problem. The commit that breaks things is:
commit cbde689823776d187ba1b307a171625dbc02dd4f
Author: Mauro Carvalho Chehab <[email protected]>
Date: Fri Feb 4 10:42:09 2011 -0300
[media] tuner-core: Better implement standby mode
In the past, T_STANDBY were used on devices with a separate radio tuner to
mark a tuner that were disabled. With the time, it got newer meanings.
Also, due to a bug at the logic, the driver might incorrectly return
T_STANDBY to userspace.
So, instead of keeping the abuse, just use a boolean for storing
such information.
We can't remove T_STANDBY yet, as this is used on two other drivers. A
latter patch will address its usage outside tuner-core.
Thanks-to: Devin Heitmueller <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Link summary:
-----------------
kernel thread:
https://bugzilla.kernel.org/show_bug.cgi?id=42564
Bisected commit: Udo Steinberg
https://lkml.org/lkml/2011/11/11/257
Broken since 2.6.39
https://lkml.org/lkml/2011/12/15/177
Maybe there is the possibility to revert the commit and backport to
precise kernel 3.2.
Best regards, Bernhard
** Bug watch added: Linux Kernel Bug Tracker #42564
http://bugzilla.kernel.org/show_bug.cgi?id=42564
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https://bugs.launchpad.net/bugs/776065
Title:
FM Radio doesn't work, only TV
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