[linux-audio-user] still have bad sound

Alex Timmer mijn_troep at yahoo.com
Fri Feb 13 08:15:36 EST 2004

hello again,

 --- Dave Phillips <dlphilp at bright.net> wrote: > Greetings:
>   I've narrowed down some parts of my current problems with sound.
> The 
> mouse is definitely a noise-maker: I move, I get a not-nice ripping 
> noise that tracks along with the mouse movement. I had hoped that the
> problem would be the nVidia binary video driver, but the problem
> occurs with the kernel sources driver as well. I've appended some
> background info in case anyone sees an obvious flaw in the system.
>   A couple of things: I have no USB devices on this machine, so how
> can I get rid of the usb-uhci stuff hanging off the same interrupt
> as the SBLive ? Also, would it do any good to switch slots ?

i already replied with the no-hlt suggestion, but still want to add...

my system is actually very similar to yours in that i also have a kt133
chipseet, Nvidia videocard, SBLive card... i even run the same CCRMA
kernel   ;-)

about irqs : irq 3 is *very* low priority so definately worth changing.
i would try one of following:

1) see if you can change the irq in the bios. my bios allows to change
certain irq's of pci slots and even onboard devices.
2) move the SBLive to another slot.

if moving to another slot does not change the irq order after you boot
linux, you might have to turn acpi off. you can boot with something
like pci=biosirq or pci=noapic or acpi=off. i need that to avoid that
linux reshuffles my 'perfect' bios irq settings. (i am at work now,
this is from memory 8)

good luck, let us know how you get along...

>   I've tried a number of different changes to XF86Config, got no joy 
> from any. :(  I've been working through the various suggestions from
> the 
> Audio Quality HOWTO, nothing has worked yet. I'm open to any other 
> non-$$$ suggested solutions...
> Best regards,
> dp
>     800 MHz Duron CPU
>     512 MB RAM
>     SBLive Value
>     kernel 2.4.24-ll (Planet CCRMA)
>     ALSA 1.0.1
> [dlphilp at localhost dlphilp]$ lspci
> [dlphilp at localhost dlphilp]$ cat /proc/interrupts
>            CPU0      
>   0:   11070087      XT-PIC  timer
>   1:      16145          XT-PIC  keyboard
>   2:          0               XT-PIC  cascade
>   3:     175283         XT-PIC  usb-uhci, usb-uhci, EMU10K1
>   8:          1               XT-PIC  rtc
>   9:          0               XT-PIC  Ensoniq AudioPCI
>  10:     976593       XT-PIC  nvidia
>  11:     447118       XT-PIC  eth0
>  12:     575359       XT-PIC  PS/2 Mouse
>  14:      27715        XT-PIC  ide0
>  15:       1676         XT-PIC  ide1
> NMI:          0
> LOC:   11070994
> ERR:      45523
> MIS:          0

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