cx23885 module fails to load with linux-backports-modules-media-2.6.35-28-generic installed

[Leon]

Binary package hint: linux-backports-modules-media-2.6.35-28-generic

With linux-image-2.6.35-28-generic and linux-backports-modules-media-2.6.35-28-generic installed, the cx23885 module fails to load:

[ 12.189968] cx23885: disagrees about version of symbol __ir_input_register
[ 12.189979] cx23885: Unknown symbol __ir_input_register (err -22)

With only linux-image-2.6.35-28-generic installed, the module loads successfully:

[ 12.187193] cx23885 driver version 0.0.2 loaded
[ 12.194427] ACPI: PCI Interrupt Link [LN0A] enabled at IRQ 18
[ 12.194447] alloc irq_desc for 18 on node -1
[ 12.194454] alloc kstat_irqs on node -1
[ 12.194477] cx23885 0000:02:00.0: PCI INT A -> Link[LN0A] -> GSI 18 (level, low) -> IRQ 18
[ 12.195348] CORE cx23885[0]: subsystem: 18ac:db78, board: DViCO FusionHDTV DVB-T Dual Express
[ 12.240538] r8169 0000:04:00.0: eth0: link up
[ 12.240556] r8169 0000:04:00.0: eth0: link up
[ 12.472166] Registered IR keymap rc-fusionhdtv-mce
[ 12.472487] input: i2c IR (FusionHDTV) as /devices/virtual/rc/rc1/input6
[ 12.472654] rc1: i2c IR (FusionHDTV) as /devices/virtual/rc/rc1
[ 12.472665] ir-kbd-i2c: i2c IR (FusionHDTV) detected at i2c-1/1-006b/ir0 [cx23885[0]]
[ 12.473057] cx23885_dvb_register() allocating 1 frontend(s)
[ 12.473072] cx23885[0]: cx23885 based dvb card
[ 12.544780] xc2028 1-0061: creating new instance
[ 12.544792] xc2028 1-0061: type set to XCeive xc2028/xc3028 tuner
[ 12.544805] DVB: registering new adapter (cx23885[0])
[ 12.544818] DVB: registering adapter 0 frontend 0 (Zarlink ZL10353 DVB-T)...
[ 12.545851] cx23885_dvb_register() allocating 1 frontend(s)
[ 12.545867] cx23885[0]: cx23885 based dvb card
[ 12.547059] xc2028 2-0061: creating new instance
[ 12.547071] xc2028 2-0061: type set to XCeive xc2028/xc3028 tuner
[ 12.547087] DVB: registering new adapter (cx23885[0])
[ 12.547101] DVB: registering adapter 1 frontend 0 (Zarlink ZL10353 DVB-T)...
[ 12.548170] cx23885_dev_checkrevision() Hardware revision = 0xb0
[ 12.548191] cx23885[0]/0: found at 0000:02:00.0, rev: 2, irq: 18, latency: 0, mmio: 0xf9e0000
[ 12.548207] cx23885 0000:02:00.0: setting latency timer to 64

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-backports-modules-media-2.6.35-28-generic (not installed)
ProcVersionSignature: Ubuntu 2.6.35-28.50-generic 2.6.35.11
Uname: Linux 2.6.35-28-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Tue Jun 21 16:25:49 2011
InstallationMedia: Mythbuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-backports-modules-2.6.35

[Leon (thumk)]

Just to explain what I am trying to get working...

I have a DViCO FusionHDTV DVB-T Dual Express (using the cx23885 module) and a SoundGraph PAD LCD/IR (variant 15c2:0038, using lirc_dev and imon modules) in this machine.

The imon module from linux-image-2.6.35-28-generic is giving multiple key events for the remote's arrow keys. This has been documented in bug #670483 , with a fix released as linux-backports-modules-media-2.6.35-28-generic.

With this backports package installed, the Soundgraph remote functions correctly, however the cx23885 module then fails to load (detailed above).

As per Jarod Wilson's comment #1 on bug #666493 , the change for the updated imon module has been consider "too invasive a patchset for an Ubuntu SRU kernel", so I assume it will be only released as a backport.

Given this... I can't see a way to get both devices functioning correctly at the same time.