Bug 55970 - loads usb audio driver blocking emu10k1 driver from working
loads usb audio driver blocking emu10k1 driver from working
Product: Red Hat Linux
Classification: Retired
Component: hotplug (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Bill Nottingham
Brock Organ
Depends On:
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Reported: 2001-11-09 11:55 EST by Need Real Name
Modified: 2014-03-16 22:24 EDT (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2005-02-04 15:47:38 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Need Real Name 2001-11-09 11:55:59 EST
Description of Problem:
After 7.2 boots, the only sound service available is my usb microphone (on
my Logitech QuickCam 3000). My Creative Labs Live soundcard is not shown in
any of the mixers. I have to '/sbin/rmmod audio' to get my soundcard to
work. Once I do that the sound card will be shown in the mixer and the usb
audio module will *magically* reload and be in the mixer too.

Version-Release number of selected component (if applicable):

How Reproducible:
Just boot 7.2 with a usb microphone (say on a webcam) and a Sound Blaster
sound card installed.

Steps to Reproduce:
1. Boot Red Hat 7.2
2. Open any mixer (i.e. gmix), see that USB Class Audio is only device
3. su to root, /sbin/rmmod audio
4. See that Creative Labs Sound Blaster Live and USB Class Audio devices
are both shown in mixer.
5. I can now play MP3's

Actual Results:
I could (after completing the steps) properly use my soundcard.

Expected Results:
The usb audio module should not be loaded first or in a fashion that blocks
the more crucial emu10k1 driver from working properly.

Additional Information:
I'll let the bug fixer ssh into my system if they want, so they can see
what's going on.
Comment 1 Trond Eivind Glomsrxd 2001-11-09 12:25:50 EST
I understand the problem, but can't think of a fix right know... for a
workaround, you can put the driver in /etc/hotplug/blacklist
Comment 2 Bryce Nesbitt 2002-03-22 14:18:16 EST
For me the problem is present, but just annoying.  Both my scsi CDROM and my
built in audio device change numbers if a USB device is plugged in at boot.

USB devices must be recognized after motherboard devices, to keep things
Comment 3 Trond Eivind Glomsrxd 2002-04-11 15:08:20 EDT
"alias audio off" in modules.conf works well... anyway, I think this is more of
an initscripts issue... soundcards must be initialized earlier, to avoid this.
Comment 4 Bill Nottingham 2002-04-11 15:21:41 EDT
initscripts does not initialize pci sound cards.
Comment 5 Bill Nottingham 2005-02-04 15:47:38 EST
Closing out bugs on older, no longer supported, releases. Apologies
for any lack of response.

This is fixed in FC3 with the new hardware initialization on boot.

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