Interference between sound card and webcam

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Hi all.

I have  a PC with Fedora Core 6, and the on-board VIA 8235 sound chip 
is detected by ALSA.

I tried connecting a Microsoft LiveCam USB webcam with built-in 
microphone (ID 045e:00f7) to the USB port and boot the PC. The webcam 
is not detected by the Video4Linux subsystem, but this is not the worst 
part. Now, the sound card does not work properly: every attempt of 
opening /dev/dsp for writing fails with "Permission denied".

The kernel is the stock one (2.6.18-1.2798.fc6), there are alsa-lib-
1.0.12-2.fc6 and  alsa-utils-1.0.12-3.fc6. I could not find anything 
suspect in dmesg's output.

What else should I try (apart from disconnecting the webcam and 
rebooting)?

Regards,
Fabrizio


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