[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
[Expired for linux (Ubuntu) because there has been no activity for 60 days.] ** Changed in: linux (Ubuntu) Status: Incomplete = Expired -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/784280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
Tony Pursell, thank you for reporting this and helping make Ubuntu better. This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ . If it remains an issue, could you run the following command in the development release from a Terminal (Applications-Accessories-Terminal). It will automatically gather and attach updated debug information to this report. apport-collect -p linux replace-with-bug-number Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream- testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Please let us know your results. Thanks in advance. ** Tags added: needs-upstream-testing ** Tags added: needs-bisect regression-release ** Changed in: linux (Ubuntu) Status: Confirmed = Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/784280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
Hi Christopher This is indeed still a problem on my HP desktop PC. It has never been a problem on my Asus EEEPC netbook. When the new 12.04 is released in 5 days time I will upgrade and let you know if this is still a problem. If it is, I will consider testing the latest mainline build, but this is a bit daunting for a non-techie like me :) Tony -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/784280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
Hi Christopher I may have come across an idea of where the problem lies, but I don't have the technical understanding to know how this causes the problem. I started by looking at the log files (syslog and kern.log) using the System Log Viewer, then started to use Google to try and get some understanding of what is happening. One thing I looked for was references to ehci_hcd and came across this web page http://www.geekdevs.com/2010/04/solved-unable-to-enumerate-usb-device- disabling-ehci_hcd/ So I tried commands given there to disable ehci_hcd, that is cd /sys/bus/pci/drivers/ehci_hcd/ sudo sh -c 'find ./ -name :00:* -print| sed s/\.\///unbind' Having done that it appears that the webcam still works and does not disconnect. When it is manually disconnected and reconnected it connects using ohci_hcd. Of course I do not know the full implications of disabling ehci_hcd, except that I understand that USB support is demoted from 2.0 to 1.1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/784280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
Even your EEEPC has integrated usb 3.0, but your camera still works with usb 2.0 mode, and it is still the ehci hcd to drive your camera. Could you collect some usbmon(see Documentation/usb/usbmon.txt for reference) info to help troubleshoot the problem? Considered 10min may produce very large usbmon data, you can just upload the data captured in the last seconds before disconnecting. thanks, -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/784280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
Can you give me a link to instructions for usbmon, please -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/784280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 784280] Re: Logitech UVC webcam keeps disconnecting
On Wed, Aug 3, 2011 at 5:27 AM, Tony Pursell ajpurs...@openoffice.org wrote: Can you give me a link to instructions for usbmon, please See Documentation/usb/usbmon.txt, which is included into kernel source code. If you have not kernel source code at hand, you can refer to the link below: http://lxr.free-electrons.com/source/Documentation/usb/usbmon.txt thanks, -- Ming lei -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/784280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
I have now tested the Logitech C250 UVC webcam plugged into another machine (an EEEPC 1015PEM). It ran for 2 hours with no problem (until it went into suspend mode due to low battery). It is running Ubuntu 11.04 with kernel 2.6.38.10-generic. On this PC (just updated to 2.6.38.10-generic-pae) it ran for only 10 minutes before being disconnected. The EEEPC has USB version 3.0. Please let me know if you need any more testing. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/784280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
Walter, it is very different with #753714. In #753714 , the problem is about a fullspeed usb camera(not uvc) plugged into a external usb highspeed hub, which is not supported well in linux, also is a dark area in usb 2.0 spec. This bug is about a uvc camera, which is a highspeed device, and the device is disconnected easily. Generally speaking, usb device disconnection is triggered by device itself, often is caused by bad usb cable or buggy device inside. Coud you try to plug this device(with same cable) into another machine(or windows) to see if it will happen again? thanks, -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/784280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
Thanks Ming Lei for your interest in this bug. I will try with another machine but I will not be able to do that until I am back from the holiday I am currently on. Tony -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/784280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
Tony Purcell, do you observe what I report in bug #753714 ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
No, I don't see what you see, Walter. BTW I am Tony Pursell, not Purcell. If the Google spell check tells you that you are spelling my name wrong, just ignore it. Better still, right click on it and select 'Add to Dictionary'. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
I would further add that there were no problems like this in Lucid. In Maverick there was some instability when using Skype, but nothing as consistent as this. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 784280] Re: Logitech UVC webcam keeps disconnecting
** Changed in: linux (Ubuntu) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784280 Title: Logitech UVC webcam keeps disconnecting -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
