Created attachment 25940 [details] Syslog corruption. mantis loaded with verbose=3. Random lockups occur when the DVB card is being actively used by an application (mythtv and tvheadend tested). It takes from 1 to 24 hours before problem occurs, but it always does. On some occations there is a complete freeze requiring hard reboot, on other occations machine instantly reboots. If the mantis module is loaded, but no DVB-application running no lockups or reboots are observed. Only when application is started. It can happen when no channel is being watched or when watching a channel. Several different revisions of mantis and various stock Ubuntu kernels tested, same results. On the very last occurence I had, syslog suddenly was filled with binary garbage and what appears to be function calls relating to the 9p protocol. This is not used on the machine, so it puzzles me. Possible memory corruption? Not been able to locate a different card to test with. No other issues, segfaults or anything else besides the use of the mantis module. lspci: 01:05.0 Multimedia controller: Twinhan Technology Co. Ltd Mantis DTV PCI Bridge Controller [Ver 1.0] (rev 01) Subsystem: TERRATEC Electronic GmbH Device 1178 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 (2000ns min, 63750ns max) Interrupt: pin A routed to IRQ 5 Region 0: Memory at dffff000 (32-bit, prefetchable) [size=4K] Kernel modules: mantis
Not much we can do with the data here so closing. If you've seen it with a modern kernel please update the bug