Found something in my log:
Feb 9 23:29:06 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:06 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:07 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:07 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:10 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:10 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:11 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:11 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:13 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:13 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:14 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:14 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:16 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:16 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:17 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:17 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:18 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:18 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:19 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:19 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:20 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:20 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:21 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:22 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:23 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:23 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:29:25 htpc vdr: [1815] frontend 1/0 lost lock on channel 20, tp 402
Feb 9 23:29:25 htpc vdr: [1815] frontend 1/0 regained lock on channel 20, tp
402
Feb 9 23:30:58 htpc vdr: [1815] frontend 1/0 timed out while tuning to channel
0, tp 177
Feb 9 23:31:37 htpc vdr: [1815] frontend 1/0 lost lock on channel 109, tp 242
Feb 9 23:31:39 htpc vdr: [1815] frontend 1/0 timed out while tuning to channel
109, tp 242
Feb 9 23:31:52 htpc vdr: [1815] frontend 1/0 regained lock on channel 49, tp
250
Feb 9 23:31:53 htpc kernel: [13123.832018] av7110_fw_request: timeout waiting
for COMMAND to complete
Feb 9 23:31:53 htpc kernel: [13123.840126] dvb-ttpci: StopHWFilter error cmd
0b08 0001 ret ff92 resp fb28 c8df pid 18
Feb 9 23:31:54 htpc kernel: [13124.848018] dvb-ttpci: __av7110_send_fw_cmd():
timeout waiting for COMMAND idle
Feb 9 23:31:54 htpc kernel: [13124.864207] dvb-ttpci: av7110_fw_request error
-110
Feb 9 23:31:54 htpc kernel: [13124.872244] dvb-ttpci: StopHWFilter error cmd
0b08 0001 0001 ret ff92 resp 0296 0020 pid 0
Feb 9 23:31:55 htpc kernel: [13125.880017] dvb-ttpci: __av7110_send_fw_cmd():
timeout waiting for COMMAND idle
Feb 9 23:31:55 htpc kernel: [13125.896086] dvb-ttpci: av7110_fw_request error
-110
Feb 9 23:31:55 htpc kernel: [13125.904224] dvb-ttpci: StopHWFilter error cmd
0b08 0001 0002 ret ff92 resp 0296 0020 pid 17
Feb 9 23:31:56 htpc vdr: [1815] frontend 1/0 lost lock on channel 49, tp 250
Feb 9 23:31:56 htpc vdr: [1815] frontend 1/0 regained lock on channel 49, tp
250
Feb 9 23:31:56 htpc kernel: [13126.912019] dvb-ttpci: __av7110_send_fw_cmd():
timeout waiting for COMMAND idle
Feb 9 23:31:56 htpc kernel: [13126.928376] dvb-ttpci: av7110_fw_request error
-110
Feb 9 23:31:56 htpc kernel: [13126.936482] dvb-ttpci: StopHWFilter error cmd
0b08 0001 0003 ret ff92 resp 0296 0020 pid 16
Feb 9 23:31:56 htpc kernel: [13126.937528] dvb-ttpci: ARM crashed @ card 1
Feb 9 23:31:56 htpc kernel: [13126.950814] dvb :00:13.0: firmware:
requesting av7110/bootcode.bin
Feb 9 23:31:56 htpc vdr: [1816] ERROR: can't set filter (pid=18, tid=40,
mask=C0): Operation not permitted
Feb 9 23:31:56 htpc vdr: [1816] ERROR: can't set filter (pid=0, tid=00,
mask=FF): Operation not permitted
Feb 9 23:31:56 htpc vdr: [1816] ERROR: can't set filter (pid=17, tid=42,
mask=FF): Operation not permitted
Feb 9 23:31:56 htpc vdr: [1816] ERROR: can't set filter (pid=16, tid=40,
mask=FF): Operation not permitted
Feb 9 23:31:56 htpc kernel: [13126.989556] dvb-ttpci: StartHWFilter error buf
0b07 0010 0012 b96a ret -1 handle
Feb 9 23:31:56 htpc kernel: [13126.989992] dvb-ttpci: StartHWFilter error buf
0b07 0010 b96a ret -1 handle
Feb 9 23:31:56 htpc kernel: [13126.990329] dvb-ttpci: StartHWFilter error buf
0b07 0010 0011 b96a ret -1 handle