Bug 3735

Summary: USB-Audio freezes after a while
Product: Drivers Reporter: asmund
Component: USBAssignee: Jaroslav Kysela (perex)
Status: RESOLVED CODE_FIX    
Severity: normal CC: A.Kuckartz, perex
Priority: P2    
Hardware: i386   
OS: Linux   
Kernel Version: 2.6.9 Subsystem:
Regression: --- Bisected commit-id:
Bug Depends on:    
Bug Blocks: 5089    

Description asmund 2004-11-11 15:41:10 UTC 
Distribution:   Debian unstable 
Hardware Environment:    
  AMD K7 800, 512MB RAM, Creative SoundBlaster, external (USB) 
Software Environment: 
  KDE 3.3.1, arts or gstreamer 
Problem Description: 
 
The sound card stops working after a while (half an hour or so). The card has a 
blue light on top, which lights up when the usb-audio system starts and flashes 
when there is sound output. After the approx. half an hour, the light goes 
dark, sound stops and it is impossible to restart. 
 
Removing and reattaching the usb connection sometimes fixes the problem, almost 
always the light comes on again. 
 
When shutting down, the system hangs  (black window, X cursor active). 
Unplugging the usb cable makes the system shut down.  Strange :-) 
 
(I have also observed full lockup of my keyboard, but not the mouse, when I 
unplugg and reconnect the usb cable. Neither keyboard or mouse are connected 
through USB. This cannot be consistently reproduced, however.) 
 
Steps to reproduce: 
 
From fresh startup, start X and KDE, log on, start amarok (or other player), 
play some music, observe sound system freeze.
Comment 1 asmund 2004-11-19 08:53:37 UTC 
The following shows up in my syslog: 
 
kernel: uhci_hcd 0000:00:07.2: host system error, PCI problems? 
kernel: uhci_hcd 0000:00:07.2: host controller halted, very bad! 
 
Perhaps this is an USB issue?
Comment 2 asmund 2004-12-01 02:59:31 UTC 
Having considered this a bit more, I feel it is more likely to be an USB issue 
than ALSA, and has retagged it. 
 
I will happily provide any debugging information needed, I can consistently 
reproduce this. It appears much more frequently when there is significant disk 
activity.
Comment 3 Greg Kroah-Hartman 2005-08-18 21:38:42 UTC 
Does this still happen on 2.6.13-rc6 or greator?  If so, please reopen this bug.