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SubjectRe: via82cxxx_audio driver bug?
> > and if they've seen XMMS or other audio applications with access to
> > /dev/mixer have strange, temporarily lockups when not in root/realtime
> > priority. I've yet to be able to test this with other audio applications
> > besides XMMS.
>
> yes.. i see this too with the via82cxxx_audio driver on my Tyan
> AMD751+Via southbridge board.
>
> /anything/ that accesses /dev/mixer or /dev/dsp while sound is being
> played is locked. Eg, play an mp3 with xmms. while playing, xmms and
> things like the gnome and WM mixer applets are all unresponsive. they
> respond to UI interaction maybe only every 30 seconds or longer.
>
> xmms with real-time priority does not suffer from this
> unresponsiveness.

This bug was reported before some time even on sourceforge, where this
driver is developed.

It happens even when running silly volume adjusting console program
(http://pasky.ji.cz/~pasky/cp/volume.c) - try to strace it, it hangs
in depth of the ioctl()s called - but it happens only when you are
actually playing something also.

--

Petr "Pasky" Baudis
. .
#define BITCOUNT(x) (((BX_(x)+(BX_(x)>>4)) & 0x0F0F0F0F) % 255)
#define BX_(x) ((x) - (((x)>>1)&0x77777777) \
- (((x)>>2)&0x33333333) \
- (((x)>>3)&0x11111111))
-- really weird C code to count the number of bits in a word
. .
My public PGP key is on: http://pasky.ji.cz/~pasky/pubkey.txt
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GCS d- s++:++ a--- C+++ UL++++$ P+ L+++ E--- W+ N !o K- w-- !O M-
!V PS+ !PE Y+ PGP+>++ t+ 5 X(+) R++ tv- b+ DI(+) D+ G e-> h! r% y?
------END GEEK CODE BLOCK------
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