On 02/04/2017(Sat) 07:10 Torfinn Ingolfsen <[email protected]> wrote: > To: [email protected] > Subject: Re: [sane-devel] Experience with the v4l backend? > Date: > > On Wed, Feb 1, 2017 at 3:56 PM, <[email protected]> wrote: > > > > I can't take a gray scale image with my usb cam either. > > I'd guess that this is a bug. > > Possibly, yes. > > > I fact, I can only take one image and then the second generates an > > error. > > Ok, that is a bug. The question is if it is a bug with sane or with > the device itself. Sorry, catching up with my mail.
> Does the device (usb cam) worh with other programs after taking an > image with sane first? I'm not sure, now I can't scan at all via the v4l. I just tried, scanimage reported an I/O error, and the kernel has spat out a bunch of info: Mar 15 03:02:01 [kernel] [1165605.488904] uvcvideo: Failed to query (131) UVC probe control : -71 (exp. 26). Mar 15 03:02:01 [kernel] [1165605.493100] uvcvideo: Failed to set UVC probe control : -71 (exp. 26). Mar 15 03:02:01 [kernel] [1165605.500103] uvcvideo: Failed to set UVC probe control : -71 (exp. 26). Mar 15 03:02:01 [kernel] [1165605.504359] uvcvideo: Failed to set UVC probe cont rol : -71 (exp. 26). Mar 15 03:02:01 [kernel] [1165605.508605] uvcvideo: Failed to set UVC probe control : -71 (exp. 26). Mar 15 03:02:01 [kernel] [1165605.512880] uvcvideo: Failed to set UVC probe control : -71 (exp. 26). Mar 15 03:02:01 [kernel] [1165605.517106] uvcvideo: Failed to query (GET_CUR) UVC control 6 on unit 2: -71 (exp. 2). Mar 15 03:02:01 [kernel] [1165605.521358] uvcvideo: Failed to query (SET_CUR) UVC control 2 on unit 2: -71 (exp. 2). Mar 15 03:02:01 [kernel] [1165605.525609] uvcvideo: Failed to query (SET_CUR) UVC control 6 on unit 2: -71 (exp. 2). Mar 15 03:02:01 [kernel] [1165605.529862] uvcvideo: Failed to query (SET_CUR) UVC control 3 on unit 2: -71 (exp. 2). Mar 15 03:02:01 [kernel] [1165605.534104] uvcvideo: Failed to query (SET_CUR) UVC control 7 on unit 2: -71 (exp. 2). Mar 15 03:02:01 [kernel] [1165605.538355] uvcvideo: Failed to query (SET_CUR) UVC control 9 on unit 2: -71 (exp. 2). Mar 15 03:02:01 [kernel] [1165605.542611] uvcvideo: Failed to set UVC probe control : -71 (exp. 26). Mar 15 03:02:01 [kernel] [1165605.546853] uvcvideo: Failed to set UVC probe control : -71 (exp. 26). Mar 15 03:02:01 [kernel] [1165605.577255] usb 3-1.3: USB disconnect, device number 82 Now /dev/video0 has vanished and sane reports no v4l. It could really be the cam, most of this laptop has broken (and only after 2 years ): It's not a huge issue for me, I hardly used it anyway. Thanks, David -- sane-devel mailing list: [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
