Comment 0 for bug 306664

Ubuntu 8.10 > kernel 2.6.27-10-generic

The nvidia driver fails to load when the cx18 (cx23418)module is loaded. The cx18 module has only first appeared in 2.6.27 from Hauppauge. It is a beta driver for Hauppauge/Conexant TV tuner/radio cards. Anyone with cards that use this driver cannot get the nvidia driver to initialize because of a virtual memory conflict with the cx18 module. The two modules cannot coexist normally. After installing the nvidia driver, the user is greeted with bulletproofx in low res mode. The only solution so far is to pass the vmalloc argument at boot to reallocate virtual memory. I use vmalloc=256M, but some have reported success with vmalloc=192M. I believe the cx18 module is in the v4l-dvb package.

[lspci -kvv]

01:05.0 Multimedia video controller: Conexant Systems, Inc. CX23418 Single-Chip MPEG-2 Encoder with Integrated Analog Video/Broadcast Audio Decoder
 Subsystem: Hauppauge computer works Inc. Device 7400
 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 (500ns min, 50000ns max), Cache Line Size: 64 bytes
 Interrupt: pin A routed to IRQ 16
 Region 0: Memory at e8000000 (32-bit, non-prefetchable) [size=64M]
 Capabilities: <access denied>
 Kernel driver in use: cx18
 Kernel modules: cx18