On za, 2007-11-03 at 21:16 -0700, M.A.E. Hanson wrote:
> mythbox-mbe:~# dmesg | grep ivtv
> ivtv:  ==================== START INIT IVTV ====================
> ivtv:  version 1.0.0 (2.6.22-2-amd64 SMP mod_unload ) loading
> ivtv0: Autodetected Hauppauge card (cx23416 based)
> ivtv0: unable to open firmware v4l-cx2341x-enc.fw (must be 376836 bytes)
> ivtv0: did you put the firmware in the hotplug firmware directory?
> ivtv0: Retry loading firmware
> ivtv0: unable to open firmware v4l-cx2341x-enc.fw (must be 376836 bytes)
> ivtv0: did you put the firmware in the hotplug firmware directory?
> ivtv0: Error initializing firmware
> ivtv0: Error -19 on initialization
> ivtv:  ====================  END INIT IVTV  ====================
> 
>
> If I place the firmware in /lib/firmware (actual files, not symlinks) I 
> get kernel panics with my logs full of errors like this:
> 
> Nov  3 20:23:38 mythbox-mbe kernel: DMA: Out of SW-IOMMU space for 6144 
> bytes at device 0000:00:1f.1
> Nov  3 20:23:38 mythbox-mbe kernel: DMA: Out of SW-IOMMU space for 8192 
> bytes at device 0000:00:1f.1
> Nov  3 20:23:38 mythbox-mbe kernel: DMA: Out of SW-IOMMU space for 16384 
> bytes at device 0000:00:1f.1
> Nov  3 20:23:38 mythbox-mbe kernel: DMA: Out of SW-IOMMU space for 12288 
> bytes at device 0000:00:1f.1
> Nov  3 20:23:38 mythbox-mbe kernel: DMA: Out of SW-IOMMU space for 45056 
> bytes at device 0000:00:1f.1

Try passing swiotlb=128 to the kernel at boot and see if this solves the
problem.

Greets
Sander


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