Re: [Openvortex-dev] Alsa driver...

[Jeff Muizelaar]

On Mon, 21 Apr 2003, Shamus wrote:

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> Hi!
>
> >I have a Athlon 1.4GHz too, but with 256MB and a Digital Research
> Vortex 2,
> >a Diamond MX300 and a Turtle Beach Montego. Very similar to yours.
> >Mainboard uses a SiS chipset (SiS 735), which semes to be more stable
> >than VIA and friends with the binary driver.
>
> I'm pretty sure that I have a VIA chipset/BIOS.
>
> >> Well, I did this, and it seemed to work OK. I tried enabling it
> again
> >> and having the interrupt do a printk() (in order to see if the
> pointer
> >> being cast was good) before returning immediately, but it seemed to
> >> lock me out of the keyboard (it could have crashed the kernel hard,
> >> but I would never know) this time.
> >
> >You have to reset the interrupt flags, if you don't, you get a
> hardlock
> >(the interrupt must be cleared, if not it is executed over and over
> >again.).
> >To clear the interrupts (there is comment which indicates that
> operation)
> >is done by writing 0xffffffff to ... don't remember what register,
> sorry.
>
> I did this, and it still hard locked... I did it both with and without
> diagnostic printk statements, but the result was the same. The
> interrupt seems to work, but simply takes all the CPU's time--when I
> used the printk statements, it kept printing the diagnostic message
> over and over, but wouldn't let me access the keyboard, other VTs,
> etc.
>
> Another bizarre thing is that once the driver hard locks and I reboot,
> the install of the patched driver seemingly refuses to allow me to
> comment out the IRQ handler! Even if I do a make uninstall clean &&
> make install! Checking the file I modified (au88x0_core.c), I can see
> that the changes I made are still there (i.e., commenting out the
> IRQ), but recompiling and reinstalling doesn't seem to make a
> difference. The only way that I can recover from this is to reinstall
> from the ALSA tarball and re-patch... This problem is making it very
> difficult for me do any work on the driver. I don't know if it makes
> any difference, but my main partition is reiserfs. But the problem
> *still* persists even if I cleanly shutdown after
> recompiling/installing before I do the "modprobe snd-au8830".

This sounds like build problems... Are new/different modules being put
into /lib/modules/`uname -r`/kernel/sound?

Maybe try checking out alsa from the openvortex cvs instead of patching
an alsa tarball...

-Jeff