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SubjectHunting a 2.x.* bug / where's limitpatch.pl?

A weird bug(?) has been bothering me since 2.0.1 ...
sound gets screwed up (slightly) in playmidi -g with some .mids ...
AND the bug seems to have nothing to do with sound driver (have tried
2.0.0 sound driver in 2.x.xx and backwards)

Any hints how to hunt down the bug? I'd guess it might be interrupt / dma
handlers...

So where's limitpatch.pl I heard about? it might be useful ;)

Current sound driver settings for those who want to know:

Sound Driver:3.5.4-960630 (Wed Nov 27 16:13:37 EET 1996 root,
Linux bx2 2.0.23 #45-bx Sun Oct 20 11:33:49 EET DST 1996 i586)
Kernel: Linux bx2 2.0.26 #47-bx Wed Nov 27 16:15:28 EET 1996 i586
Config options: 0

Installed drivers:
Type 4: Gravis Ultrasound
Type 25: GUS PnP

Card config:
Gravis Ultrasound at 0x220 irq 11 drq 5,3

Audio devices:
0: GUS MAX (IWave) (DUPLEX)
1: Gravis UltraSound (DUPLEX)

Synth devices:
0: Gravis UltraSound MAX (1024k)

Midi devices:
0: Gravis UltraSound Midi

Timers:
0: System clock

Mixers:
0: GUS MAX (IWave)
1: Gravis Ultrasound

And cpuinfo (if you want to know;):

processor : 0
cpu : 586
model : Pentium 75+
vendor_id : GenuineIntel
stepping : 4
fdiv_bug : no
hlt_bug : no
fpu : yes
fpu_exception : yes
cpuid : yes
wp : yes
flags : fpu vme de pse tsc msr mce cx8
bogomips : 36.04

And interrupts:

interrupts
0: 1865448 timer
1: 74012 keyboard
2: 0 cascade
4: 4769 + serial
8: 0 + rtc
10: 32311 + aic7xxx
11: 227 Gravis Ultrasound
12: 9668 3c509
13: 1 math error
14: 14746 + ide0
15: 82 + ide1

What else might be useful?

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