[uvcvideo causes ehci_hcd to force halt]Trying to use built-in webcam in certain notebooks/laptops breaks other USB devices
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Expired
|
Undecided
|
Unassigned |
Bug Description
Maverick Meerkat (10.10) Release Candidate and Final Release
Lucid Lynx (10.04)
Karmic Koala (9.10)
To recreate run Cheese, Ekiga or aMSN (basically anything that will try to use the webcam).
Symptoms:
1. Obviously the webcam does not work.
2. Dmesg output that looks like this:
[ 979.810911] ehci_hcd 0000:00:13.5: force halt; handhake ffffc90000364424 00004000 00000000 -> -110
3. Wireless adapter will immediately disconnect after which NetworkManager will just display 'device not ready'
(this happens when your built-in wireless is an internal USB device)
4. Suspend and/or hibernate _might_ fail if attempted.
5. In some cases inserting a memory stick or other USB storage will not work any more.
Rebooting is necessary to fix the other USB devices.
This bug seems to affect varied models of the Toshiba Satellite line as well as some other notebooks. So far a commonality between the different cases seems to be that they all use Chicony webcams and in cases where the wireless fails, the wireless adapter is also a USB device. I am collecting a list of device ids from other reporters and duplicates to this file: http://
For me this is a regression since Ubuntu 9.04.
Possible work-arounds:
1) Don't use the webcam: add 'blacklist uvcvideo' to /etc/modprobe.
2) Unblacklist usbmouse and usbkbd by commenting them out (based on bug 435352 comment #36)
Other references:
http://<email address hidden>
Changed in linux (Ubuntu): | |
assignee: | nobody → Ubuntu Kernel Team (ubuntu-kernel-team) |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
Changed in linux (Ubuntu): | |
status: | Confirmed → New |
assignee: | Ubuntu Kernel Team (ubuntu-kernel-team) → nobody |
tags: | added: kj-triage |
summary: |
- [Toshiba Satellite series]Trying to use built-in webcam breaks wireless - and/or power management + [uvcvideo causes ehci_hcd to force halt]Trying to use built-in webcam in + certain notebooks/laptops breaks other USB devices |
description: | updated |
tags: | removed: hw-specific |
Changed in linux (Ubuntu): | |
status: | Expired → New |
Changed in linux (Ubuntu): | |
status: | New → Incomplete |
description: | updated |
Changed in linux (Ubuntu): | |
status: | Incomplete → Confirmed |
tags: | removed: regression-potential |
description: | updated |
tags: | removed: apport-collected |
Since the system goes permanently offline when this bug occurs, I have attached the bug report as an offline apport file.