KWorld UB430-AF TV Tuner no longer works with kernel >= 3.10

[CarlosL]

Previously, this USB ISDB-t tuner was working fine with Ubuntu 12.04.3.
I cleanly upgraded to Ubuntu 13.10 and it stopped working: is recognized by the kernel, but when I try to tune a frequency (using vlc or mplayer), it doesn't show anything. Furthermore, scanning with 'scan' and monitoring with femon (dvb-apps) shows 0% signal.

When I downgraded the kernel to 3.9.11 (using Ubuntu PPA packages), it worked fine.

I suspect a regression was introduced in kernel 3.10 in v4l drivers.
---
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: i386
DistroRelease: Ubuntu 13.10
MarkForUpload: True
Package: linux (not installed)
Tags: saucy
Uname: Linux 3.13.0-031300rc7-generic i686
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio cdrom dip lpadmin plugdev pulse pulse-access sambashare sudo video

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1266328

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.13 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-rc7-trusty/

[CarlosL (climarino)]

apport information

[Merca (marexposed)]

Does this bug have any chance to be fixed?