intek8x0 driver

intek8x0 driver

[Dirk Aust]

Hello all,
I have some difficulties using the /dev/dsp devices, when trying to use the 
call: 

mmap2(NULL, 16384, PROT_READ, MAP_SHARED, 5, 0) = -1 EIO (Input/output error)

I can open the device:
open("/dev/dsp", O_RDONLY|O_LARGEFILE) = 5

and make use of a lots ioctl.

If I'm not root, I even can't read() from that device, even though I'm the 
owner of /dev/dsp0.

Any ideas?

Best Regards



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Re: intek8x0 driver

[Jaroslav Kysela]

On Sun, 20 Jul 2003, Dirk Aust wrote:

> Hello all,
> I have some difficulties using the /dev/dsp devices, when trying to use the 
> call: 
> 
> mmap2(NULL, 16384, PROT_READ, MAP_SHARED, 5, 0) = -1 EIO (Input/output error)

Note that you are allowed to mmap only stereo 16-bit streams with 
the intel8x0 driver (and maybe only at 48kHz rate - check your 
/var/log/messages, if your codec is restricted).

> If I'm not root, I even can't read() from that device, even though I'm the 
> owner of /dev/dsp0.

Probably a permission problem.

						Jaroslav

-----
Jaroslav Kysela <perex@suse.cz>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs



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