Re: [LAU] Decent but not necessarily pro quality USB audio for laptop?

Arnold Krille wrote:

> On Wednesday 07 January 2009 09:04:37 david wrote:
>> Arnold Krille wrote:
>>> On Tuesday 06 January 2009 11:11:44 david wrote:
>>>> Thanks, but 100E secondhand means it's probably well out of my price
>>>> range. My laptop does have a PCMCIA slot. I have a compact flash card
>>>> reader that plugs into it, but data transfers are very slow through it.
>>>> I wouldn't be surprised to find that the silly laptop shares interrupts
>>>> with PCMCIA, video and audio hardware!
>>> You can get your surprise from a simply "cat /proc/interrupts"...
>> OK, so what does the following mean:
>> 16: 1 IO-APIC-fasteoi uhci_hcd:usb1, yenta
>
> Your pcmcia is sharing the interrupt with the first usb-port. You can use lsusb
> or usbview to see which devices you plugged in there. They will disturb your
> pcmcia-experience.

That would make sense. Output of lsusb:

Bus 004 Device 010: ID 0781:8889 SanDisk Corp. SDDR-88 Imagemate 8-in-1
Reader
Bus 004 Device 008: ID 041e:3f07 Creative Technology, Ltd
Bus 004 Device 006: ID 04a9:220e Canon, Inc. CanoScan N1240U/LiDE 30
Bus 004 Device 005: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 004 Device 004: ID 0c0b:b311 Dura Micro, Inc. (Acomdata)
Bus 004 Device 003: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 1376:d002 Vimtron Electronics Co., Ltd.
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

So which one is usb1?

>> If I have a soft synth running, big updates to the screen display will
>> make it start and stop. But I'm not running an RT kernel here.
>
> Please not that while your graphics card isn't listed in the output of "cat
> /proc/interrupts" this doesn't mean that it isn't sending interrupts. Only
> there is no driver caring about them. So it can still be that the graphics is
> disturbing your sound-interrupts...

I'm pretty sure it's the graphics that are hogging things. The Intel
video driver doesn't work properly on my laptop (it blows all the fonts
up by a factor of 10), so I'm using the VESA driver.

-- 
David
gnome@email-addr-hidden
authenticity, honesty, community
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