RE: sound crashes in 2.4

RE: sound crashes in 2.4

[Chris Pockele]

> >
> >     2.4.8 dies after ~1/2 minute of mpg123 playback,
> >     with tty switching freeze, and typing out
> >     continuously (i`d say infinitely) call trace.
> >
> >         ac7 acts this way too, but before death
> >     sound stalls *some* times, i then each time restart
> >     the proggie which emits it. This pattern survives
> >     4-5 stalls, after which - final trace dump.
> >
> >     gcc-2.95.3, sb16 - genuine, vanilla ac7, vanilla
> >     2.4.8.
> 

I have the same problems with an ALS007 card (in a 486 system).
The card is correctly recognized and set up by the PnP drivers.

The system freezes completely when using sound (no ping replies
anymore), and it's not a CPU/motherboard/RAM issue
(it compiles kernels without any problems), it occurs while
playing MP3's, while playing LxDoom ( now i have an excuse
to play Doom, testing the Linux sound drivers ;) ).
The time after which it crashes is variable, sometimes it crashes
immediately, sometimes it crashes after 5 minutes.
Sometimes, it also stalls a few times before finally crashing.

Having persistant DMA buffers enabled/disabled doesn't change
anything (the machine has 16MB of RAM), and the problem occurs
both when using modules or compiled-in drivers.

Both 2.4.8 and 2.4.9 have this problem (these are the ones I tried).
Btw on 2.2.x i get DMA (output) timeout errors (and broken sound).

There is also another "issue":
the ISAPnP code calls "CMI8330 quirk".  As i have no such
card, i thought this was related to the problem.  After
commenting it out in quirks.c and recompiling, the quirk
was not called anymore, but it didn't solve the problem.

greets

Re: sound crashes in 2.4

[Chris Pockele]

Samium Gromoff wrote:
> 
> > Both 2.4.8 and 2.4.9 have this problem (these are the ones I tried).
> > Btw on 2.2.x i get DMA (output) timeout errors (and broken sound).
> 
>   just to clarify: does 2.4.7 hangs?
>   (for me it doesnt, but everything >= 2.4.8 does)
> 
After i read in this list that some people do not experience
this problem in 2.4.7, I decided to give it a try.

2.4.7 crashes too, but behaves differently:

invalid operand: 0000
CPU:	0
EIP:	0010:[<c01f5ea0>]
EFLAGS:	00010046
eax: 00000000	ebx: c0248000	ecx: c086a260	edx: c086a260
esi: c0105170	edi: ffffe000	ebp: 0008e000	esp: c0249fd0
ds: 0018   es: 0018    ss: 0018
Process swapper (pid: 0, stackpage=c0249000)
Stack: c0105193 00000010 00000246 c01051f8 00001000 0009b800 c0105000
c0105027
       c024a84e 00000000 c025c340 c0100197
Call Trace: [<c0105193>] [<c01051f8>] [<c0105000>] [c0105027>]

Code: ff e9 46 ff ff ff 90 90 90 90 90 90 90 90 90 90 68 0a ff ff
Kernel panic: Attempted to kill the idle task!
In idle task - not syncing

(This was the 2nd time i tried it out ; the 1st time
it Oopsed (0002) but i don't have that message anymore)

Re: sound crashes in 2.4

[Samium Gromoff]

> Both 2.4.8 and 2.4.9 have this problem (these are the ones I tried).
> Btw on 2.2.x i get DMA (output) timeout errors (and broken sound).

  just to clarify: does 2.4.7 hangs?
  (for me it doesnt, but everything >= 2.4.8 does)

  also as i already said, the sound isn`t clear:
  there are little clicks here and there...

  but i have an infinite trace(*). you - don`t.

  (*) - in fact there are 3 traces.
    first - quite short (1-1.5 screen)
    second - 3-4 screens, and
    third - infinite...


---


cheers,


   Samium Gromoff

Re: sound crashes in 2.4

[Samium Gromoff]

> Both 2.4.8 and 2.4.9 have this problem (these are the ones I tried).
> Btw on 2.2.x i get DMA (output) timeout errors (and broken sound).

  just to clarify: does 2.4.7 hangs?
  (for me it doesnt, but everything >= 2.4.8 does)

  also as i already said, the sound isn`t clear:
  there are little clicks here and there...

  but i have an infinite trace(*). you - don`t.

  (*) - in fact there are 3 traces.
    first - quite short (1-1.5 screen)
    second - 3-4 screens, and
    third - infinite...


---


cheers,


   Samium Gromoff

Re: sound crashes in 2.4

[Chris Pockele]

> Hello all,
>      A trace of the crashes would be helpful.
> 
unfortunately, i don't get any oops or panic messages.
There's nothing about it on the console, nothing in
logs either.

The box just freezes.  No more ping/connection
replies, no more reaction to any keyboard input.

(this must be a very hard bug)

cheers

Re: sound crashes in 2.4

[Frank Davis]

Hello all,
     A trace of the crashes would be helpful.

Regards,
Frank

Chris Pockele wrote:

>>Can you try one other thing.
>>
>>Edit drivers/pci/quirks.c
>>
>>find 
>>
>>int isa_dma_bridge_buggy; /* Exported */
>>
>>and make it read
>>
>>int isa_dma_bridge_buggy = 1;
>>
>>recompile reboot and see if it helps
>>
>>
> Unfortunately, it does not help.  The machine rebooted
> suddenly (i forgot to mention that: sometimes it reboots
> too, but mostly it just hangs).
> 
> btw the system doesn't have a PCI bus, so its kernel
> does not have PCI support enabled
> 
> (it's a SIS85C471B-based ISA/VLB motherboard)
> 
> -
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> 

Re: sound crashes in 2.4

[Chris Pockele]

> Can you try one other thing.
> 
> Edit drivers/pci/quirks.c
> 
> find 
> 
> int isa_dma_bridge_buggy; /* Exported */
> 
> and make it read
> 
> int isa_dma_bridge_buggy = 1;
> 
> recompile reboot and see if it helps
> 
Unfortunately, it does not help.  The machine rebooted
suddenly (i forgot to mention that: sometimes it reboots
too, but mostly it just hangs).

btw the system doesn't have a PCI bus, so its kernel
does not have PCI support enabled

(it's a SIS85C471B-based ISA/VLB motherboard)

Re: sound crashes in 2.4

[Alan Cox]

> I have the same problems with an ALS007 card (in a 486 system).
> The card is correctly recognized and set up by the PnP drivers.

Humm. 

> The time after which it crashes is variable, sometimes it crashes
> immediately, sometimes it crashes after 5 minutes.
> Sometimes, it also stalls a few times before finally crashing.

Ok that actually sounds more like a locking bug.

> Both 2.4.8 and 2.4.9 have this problem (these are the ones I tried).
> Btw on 2.2.x i get DMA (output) timeout errors (and broken sound).

Can you try one other thing.

Edit drivers/pci/quirks.c

find 

int isa_dma_bridge_buggy;		/* Exported */

and make it read

int isa_dma_bridge_buggy = 1;

recompile reboot and see if it helps