Red Hat Bugzilla – Bug 157726
USB audio not present after boot, replug helps
Last modified: 2007-11-30 17:11:06 EST
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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050504 Galeon/1.3.20
Description of problem:
After boot my Yamaha USB audio card (speakers) does not work / not listed in lsusb(8).
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot the system FC4test3.
2. Type: lsusb
Actual Results: This line is missing there: Bus 002 Device 003: ID 0499:3105 Yamaha Corp.
Expected Results: Bus 002 Device 003: ID 0499:3105 Yamaha Corp.
Created attachment 114369 [details]
lsusb(8) before replug
Created attachment 114370 [details]
lsusb(8) after replug
Created attachment 114371 [details]
Created attachment 114372 [details]
kernel messages after the successful replug
It appears that the device does not let the port to detect a plug,
maybe it resets too long after the power is applied to the port.
Please try to plug the audio into a socket of an external hub, preferably
a powered hub. Monitor might work. Perhaps those have +5 at all times.
I don't remember what the spec says about it.