IBM Thinkspad t20 + Sound Problem

Net Warrior netwarrior863 at
Mon Mar 31 06:30:50 PDT 2008

Hi there guys.
I bought my first note book and I 'm very excited, this not the latest intel
in the market, but does what I nedd.
But, I'm having problems with the sound driver, I 'm geting distortions when
I switch from consoles or if I do an scroll, or ls.
I had this kind of problem before with some clones, but the procedure
followed bebore did not work.

This is my config.

FreeBSD-Realm# sysctl -a |grep pcm
dev.pcm.0.%desc: CS461x PCM Audio
dev.pcm.0.%driver: pcm
dev.pcm.0.%parent: csa0
dev.pcm.0.eapd: 1 1 48000 s16le
dev.pcm.0.rec.vchans: 1
dev.pcm.0.rec.vchanrate: 48000
dev.pcm.0.rec.vchanformat: s16le
dev.pcm.0.buffersize: 0
FreeBSD-Realm# sysctl -a | grep snd
hw.snd.latency_profile: 1
hw.snd.latency: 5
hw.snd.report_soft_formats: 1
hw.snd.compat_linux_mmap: 0
hw.snd.feeder_buffersize: 65536
hw.snd.feeder_rate_round: 25
hw.snd.feeder_rate_max: 2016000
hw.snd.feeder_rate_min: 1
hw.snd.verbose: 1
hw.snd.maxautovchans: 16
hw.snd.default_unit: 0
hw.snd.version: 2007061600/i386
hw.snd.default_auto: 0

FreeBSD-Realm# vmstat -i
interrupt                          total       rate
irq0: clk                        4973648        958
irq1: atkbd0                        3670          0
irq3: cbb0 csa0                    11666          2
irq5: uhci0                         1941          0
irq8: rtc                         639222        123
irq9: acpi0+                        3095          0
irq10: cbb1 dc0                        4          0
irq12: psm0                          969          0
irq14: ata0                        71376         13
irq15: ata1                          363          0

FreeBSD-Realm# dmesg |grep irq
vgapci0: <VGA-compatible display> mem 0xf0000000-0xf7ffffff irq 3 at device
0.0 on pci1
cbb0: <TI1450 PCI-CardBus Bridge> mem 0x50000000-0x50000fff irq 3 at device
2.0 on pci0
cbb1: <TI1450 PCI-CardBus Bridge> mem 0x50100000-0x50100fff irq 10 at device
2.1 on pci0
csa0: <CS4280/CS4614/CS4622/CS4624/CS4630> mem
0xe8100000-0xe8100fff,0xe8000000-0xe80fffff irq 3 at device 5.0 on pci0
uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0x1c20-0x1c3f irq 5 at
device 7.2 on pci0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on
sio1: configured irq 3 not in bitmap of probed irqs 0
dc0: <Netgear FA511 10/100BaseTX> port 0x1100-0x11ff mem
0x88000000-0x880003ff irq 10 at device 0.0 on cardbus1

With the clones, I alway solved the problem, as suggested in the mailing
list by increasing the buffersize including it in the device.hints
file, but that did not work and dev.pcm.0.buffersize never get increased,
always stays in zero.

Thanks in advance, and for you time.

I'm using 7-0Release Stable.

More information about the freebsd-questions mailing list