Re: [gentoo-user] cx23885 (DVBSky 950) under Gentoo 4.0.5

[Heiko Baums]

Am 26.10.2015 um 23:17 schrieb Tamer Higazi:
> I do have a DVBSky S950 (PCI Express) in my gentoo system.
> The poducer of this board told me that the kernel module is: cx23885
> which I don't find. Can somebody help me which modules to load ?!
>
> Where do I find those when I compile the kernel ?
>
> 04:00.0 Multimedia video controller: Conexant Systems, Inc. CX23885 PCI
> Video and Audio Decoder (rev 04)
> 	Subsystem: DVBSky S950
> 	Flags: bus master, fast devsel, latency 0, IRQ 18
> 	Memory at fe800000 (64-bit, non-prefetchable) [size=2M]
> 	Capabilities: [40] Express Endpoint, MSI 00
> 	Capabilities: [80] Power Management version 2
> 	Capabilities: [90] Vital Product Data
> 	Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
> 	Capabilities: [100] Advanced Error Reporting
> 	Capabilities: [200] Virtual Channel

Those cx23885 based DVB cards by DVBSky or Mystique (both are
identically) need a ClosedSource driver. The DVB chip is a cx23885. The
driver for those chips is meanwhile principally included in the kernel
but doesn't work, because it needs a ClosedSource module called sit2
which is not included in the kernel.

I once bought such a DVB-C card by DVBSky, but wasn't able to install
the driver and get it running, neither from the kernel nor from
media-build-bst on the manufacturer's website which includes this sit2
module.

Their support (the manufacturer's and the retailer's) wasn't able to or
didn't want to help me. In a lot of e-mails they more or less only
repeated the installation instructions in their README which don't work.

In the end I returned that card and bought one with an saa7146 chip
which is indeed fully OpenSource and included in the kernel. That said
this card doesn't work very well, too.