Hi Jeremie,
On Tue, Mar 28, 2017 at 09:50:57PM +0200, Jeremie Courreges-Anglas wrote:
| Paul de Weerd <[email protected]> writes:
|
| > Hi all,
| >
| > I'm trying to use a pretty simple (and cheap) webcam, a Logitech C170:
| >
| > uvideo1 at uhub1 port 4 configuration 1 interface 0 "vendor 0x046d Webcam
C170" rev 2.00/28.25 addr 2
|
| Looks like this problem comes from the lack of isochronous transfer
| support in xhci. Maybe try disabling usb 3 support in your bios?
Thanks for the hint, that helped somewhat.
I moved the webcam to the other port on my Sony laptop (the original
port was behind xHCI, the other one is behind EHCI). Now, I no longer
get an ioctl(8) error. However, the webcam still doesn't work:
[weerd@drop] $ fswebcam -d /dev/video1 c170.jpg
--- Opening /dev/video1...
Trying source module v4l2...
/dev/video1 opened.
No input was specified, using the first.
Adjusting resolution from 384x288 to 432x240.
--- Capturing frame...
GD Error: gd-jpeg: JPEG library reports unrecoverable error: Not a JPEG file:
starts with 0x28 0x85Capture
d frame in 0.00 seconds.
--- Processing captured image...
Writing JPEG image to 'c170.jpg'.
The resulting JPEG just shows a black picture (with the fswebcam date
banner at the bottom).
video(1) doesn't complain, but doesn't show anything either. However,
it doesn't work for the built-in webcam anymore either. It doesn't
even open a window. I'll try to figure out what's up there later
today.
Thanks again!
Paul
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