On 09/05/2009 09:07 AM, James Cameron wrote: > On Thu, Sep 03, 2009 at 04:06:29PM +1000, Patrick Shirkey wrote: > >> What I am seeing is a massive spike in xruns when running a gui app taht >> connects to jack (even qjackctl) but nothing when playing a track from >> the commandline ie mplayer -ao jack. This only happens if the wifi >> module is installed. Without it there are no xruns for days. >> >> Unfortunately the snd the video device are on the same irq. >> >> Does anyone have an idea for why the gui system would become unstable >> when the wifi device is added? >> > /me handwaves > > It implies a larger than before amount of time being spent inside the > driver for either the wifi device or the video device. The extra time > or the temporary disabling of interrupts within that driver might be > affecting the delivery and processing of interrupts for the other two > devices. > Thanks for taking some time to consider this. The wifi device is connecting via pcie. It turns out that to get the xruns to a minimum it's necessary to run jack at rtprio 89. -- Patrick Shirkey Boost Hardware Ltd. > Consider how the wifi device is communicating with the CPU. Is it via > PCI or USB? If USB, then the type of USB controller becomes > interesting. You may have a controller that meets multiple > specifications, and if so you may get different results by manually > choosing the controller driver. Controller is often called host. > > Look at your modules installed. Scan for modules with names ending in > hcd. Test them one at a time. That is to say, remove all USB devices > except the offending device, remove (rmmod) all of the -hcd modules, > then manually insert one at a time from this set: > > ehci-hcd.ko > isp116x-hcd.ko > ohci-hcd.ko > r8a66597-hcd.ko > sl811-hcd.ko > u132-hcd.ko > uhci-hcd.ko > > ... to find which ones work with the hardware and the device (using > lsusb), then compare your findings against what was originally > installed. > > _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
