[LAU] ubuntu vs arch

[Jeremy Jongepier]

On 09/20/2011 09:40 AM, Atte André Jensen wrote:
> On 09/20/2011 08:55 AM, Jeremy Jongepier wrote:
>> On 09/20/2011 08:32 AM, Atte André Jensen wrote:
>>> Whenever a window is dragged, or there's disk activity or something like
>>> that there's an x-run.
>>
>> Hello Atte,
>>
>> Maybe the USB host controller shares its interrupt with the GPU? Could
>> you post the output of *cat /proc/interrupts* ?
> 
> As I'm away from the computer ATM, I cannot provide the output, but I
> ran cat /proc/interrupts, and AFAIR almost nothing was shared, I
> remember being both impressed and puzzled...
> 
>> And what JACK settings
>> are you using?
> 
> Don't remember the exact settings, but priority round 65 or 85,
> frames/period 128 (even very problematic at 256), periods/buffer at 3,
> samplerate 48000.
> 
>> And did you try different USB ports, different USB cables?
> 
> I thought about that but didn't get around to trying that. I think it
> has 4 usb ports + it sits in a docking station with additional 2-3
> ports. I *should* make no difference according to my logic, but my logic
> has failed before, so...
> 
> The cable was the same I used on my box, where performance was great...
> 

Thanks, well that bars out a lot of possible causes. Did you also run
*lsusb* to check what devices were connected to the USB controllers?
Maybe the keyboard and/or touchpad are connected to a USB controller too
and get in the way of the sound device.

Jeremy