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 0000  ret ffffff92  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 ffffff92  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 ffffff92  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 ffffff92  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 0000:00:13.0: 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 0000
Feb  9 23:31:56 htpc kernel: [13126.989992] dvb-ttpci: StartHWFilter error  buf 0b07 0010 0000 b96a  ret -1  handle 0000
Feb  9 23:31:56 htpc kernel: [13126.990329] dvb-ttpci: StartHWFilter error  buf 0b07 0010 0011 b96a  ret -1  handle 0000
Feb  9 23:31:56 htpc kernel: [13126.990651] dvb-ttpci: StartHWFilter error  buf 0b07 0010 0010 b96a  ret -1  handle 0000
Feb  9 23:31:57 htpc kernel: [13127.444081] dvb-ttpci: DVB-C w/o analog module @ card 1 detected
Feb  9 23:31:57 htpc vdr: [1815] frontend 1/0 lost lock on channel 49, tp 250
Feb  9 23:31:59 htpc vdr: [1815] frontend 1/0 timed out while tuning to channel 49, tp 250
Feb  9 23:32:22 htpc vdr: [1815] frontend 1/0 timed out while tuning to channel 43, tp 274
Feb  9 23:32:43 htpc vdr: [1815] frontend 1/0 timed out while tuning to channel 116, tp 298