Bug 572824

Summary: Logitech QuickCam Fusion USB uvcvideo webcam isn't recognised
Product: [Fedora] Fedora Reporter: Ira Malinich <thub>
Component: libv4lAssignee: Hans de Goede <hdegoede>
Status: CLOSED CANTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 13CC: hdegoede, laurent.pinchart
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 572811 Environment:
Last Closed: 2010-03-13 07:24:55 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 572811    
Bug Blocks:    
Attachments:
Description Flags
The end of my /var/log/messages file, as of when I plug in the webcam.
none
Results of "lsusb -v". none

Description Ira Malinich 2010-03-12 06:09:09 UTC
Created attachment 399567 [details]
The end of my /var/log/messages file, as of when I plug in the webcam.

Description of problem:
No webcam software recognises /dev/video0
I'll attach the end of my /var/log/messages file, which shows mixed messages about this device as I plug it in.

Version-Release number of selected component (if applicable):
kernel 2.6.33-1.fc13.x86_64
libv4l 0.6.4-2.fc13.x86_64

How reproducible:
Every time

Steps to Reproduce:
1. Plug in Logitech Fusion
2. Launch any webcam software
  
Actual results:
Errors regarding missing /dev/video0 or segfault (in the case of Cheese, probably needs a bug).

Expected results:
Delicious, webcammy video.

Comment 1 Ira Malinich 2010-03-12 06:10:31 UTC
Created attachment 399568 [details]
Results of "lsusb -v".

Comment 2 Ira Malinich 2010-03-12 06:18:04 UTC
It's probably also worth noting that this particular webcam probably last worked for me in Fedora 9, but one day an update broke it.  It still works in Windows though.
Also, there is a newer revision of this webcam with a different product ID, but the exact same name.  This older revision isn't supported in the newest Windows drivers available from Logitech, so I suspect the hardware is fairly different.

Comment 3 Hans de Goede 2010-03-12 06:33:42 UTC
Thanks for the reports and the logs I've mailed the upstream uvc driver author
and asked him to take a look at this.

Comment 4 Laurent Pinchart 2010-03-13 00:31:48 UTC
http://www.ideasonboard.com/uvc/#footnote-1

"First and second generation Logitech webcams suffer from firmware bug which make the camera somehow unstable. As the issue is timing-related, the exact impact of the bug on a particular user can't be predicted."

Condolences, it seems you've been hit by the infamous Logitech firmware bug. There's no solution for this at the moment, and I seriously doubt there will be any (troubleshooting the problem would require a USB 2.0 analyzer, a pretty good knowledge of the EHCI internals and lots of time).

Comment 5 Hans de Goede 2010-03-13 07:24:55 UTC
Ira, the firmware bug Laurent relates to is a lowlevel usb timing issue, which windows somehow manages to not trigger. I'm afraid there is very little we can do here, so I'm going to close this bug.