Public bug reported:
Before upgrade, mythtv was working with two separate DVB tuners.
After upgrade, mythtv can see the /dev/dvb adapters but cannot access them
("could not get card info for /dev/dvb/adapter0/frontend0"). All recordings
since the upgrade to ubuntu 24.04 have failed.
The devices seem to have the right permissions and mythtv-backend is
running as mythtv, which is a member of the video group:
ls -al /dev/dvb/adapter?
/dev/dvb/adapter0:
total 0
drwxr-xr-x 2 root root 120 Jun 3 10:21 .
drwxr-xr-x 4 root root 80 Jun 3 10:21 ..
crw-rw----+ 1 root video 212, 1 Jun 3 10:21 demux0
crw-rw----+ 1 root video 212, 2 Jun 3 10:21 dvr0
crw-rw----+ 1 root video 212, 0 Jun 3 10:21 frontend0
crw-rw----+ 1 root video 212, 3 Jun 3 10:21 net0
/dev/dvb/adapter1:
total 0
drwxr-xr-x 2 root root 120 Jun 3 10:21 .
drwxr-xr-x 4 root root 80 Jun 3 10:21 ..
crw-rw----+ 1 root video 212, 5 Jun 3 10:21 demux0
crw-rw----+ 1 root video 212, 6 Jun 3 10:21 dvr0
crw-rw----+ 1 root video 212, 4 Jun 3 10:21 frontend0
crw-rw----+ 1 root video 212, 7 Jun 3 10:21 net0
lsof /dev/dvb and fuser /dev/dvb do not report any users of the
devices (I hope I am using the command correctly)
Expected behaviour: mythtv can access the DVB tuners and use them for
live TV & recordings, as previously.
Ubuntu is now 24.04 Noble Numbat, after upgrading from 23.10.
Mythtv is now 2:34.0+fixes.20240210.e3e165a1-0ubuntu6
I am using the web frontend to access mythtv backend setup.
mythbackend.log has the following entries:
2024-06-03T10:56:06.285978+01:00 gracix2 mythbackend: mythbackend[2706]: E
HTTP0 cardutil.cpp:1249 (OpenVideoDevice) CardUtil: Can't open DVB frontend
(/dev/dvb/adapter0/frontend0) for
/dev/dvb/adapter0/frontend0.#012#011#011#011eno: Device or resource busy (16)
2024-06-03T10:56:06.448387+01:00 gracix2 mythbackend: mythbackend[2706]: E
HTTP0 cardutil.cpp:928 (ProbeCurrentDeliverySystem) CardUtil: open failed
(/dev/dvb/adapter0/frontend0)#012#011#011#011eno: Device or resource busy (16)
2024-06-03T10:56:06.448744+01:00 gracix2 mythbackend: mythbackend[2706]: E
HTTP0 cardutil.cpp:1249 (OpenVideoDevice) CardUtil: Can't open DVB frontend
(/dev/dvb/adapter1/frontend0) for
/dev/dvb/adapter1/frontend0.#012#011#011#011eno: Device or resource busy (16)
2024-06-03T10:56:06.449107+01:00 gracix2 mythbackend: mythbackend[2706]: E
HTTP0 cardutil.cpp:928 (ProbeCurrentDeliverySystem) CardUtil: open failed
(/dev/dvb/adapter1/frontend0)#012#011#011#011eno: Device or resource busy (16)
It says the device is busy, but as far as I can tell there is nothing
using the device?
Thank you in advance for any help.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: mythtv 2:34.0+fixes.20240210.e3e165a1-0ubuntu6
ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1
Uname: Linux 6.8.0-31-generic x86_64
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Mon Jun 3 10:57:46 2024
Installed_mythtv_dbg: 0.0
PackageArchitecture: all
SourcePackage: mythtv
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: mythtv (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble third-party-packages wayland-session
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https://bugs.launchpad.net/bugs/2067895
Title:
Mythtv can no longer access DVB devices after ubuntu 24.04 upgrade
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