Re: [linux-uvc-devel] Acer Usb Camera 5986:055a recogniced but no /dev/video0 entry

[Samir I. <sib...@gm...>]

Lenovo E455 here, same Acer 5986:055a camera inside. I applied the
attached patch, which is just an ugly hack that ignores "unknown entity"
& "entity X already in chain" errors @ uvc_trace @ uvc_driver.c. I was
hoping that this would help me debug the thing, but to my utter
surprise, camera actually worked. I've tested it against cheese, VLC &
skype, all but 960x540 resolution worked just fine.

Devs, please take a look in the traces, we may need some new quirk for
cameras like this one... I've seen the similar thing happening for some
other UVC cameras on the lists.

S

On 2015年06月07日 03:55, arno wilhelm wrote:
> 
>> Last time I wrote to this list was more than 7 years ago, so had to
>> register from scratch. Managed to make this 5986:055a cam work, just
>> checking if replying to old thread would work to provide more info...
> 
> Cool!! And what did u do in order to get this camera to work?
> 
> 
>>
>> S
>>
>> On 2015年05月29日 19:03, ragadinks@gm... wrote:
>>
>>> Hello,
>>>
>>> I am trying to set up a new Lenovo Thinkpad L450 and everything seems
>>> to work fine, except the build-in usb camera.
>>> When loading the the uvcvideo module with "modprobe -v uvcvideo" I get
>>> following message:
>>>
>>> [ 1547.423473] media: Linux media interface: v0.10
>>> [ 1547.427844] Linux video capture interface: v2.00
>>> [ 1547.432887] uvcvideo: Found UVC 1.00 device Integrated Camera
> (5986:055a)
>>> [ 1547.432994] uvcvideo: No valid video chain found.
>>> [ 1547.433061] usbcore: registered new interface driver uvcvideo
>>> [ 1547.433063] USB Video Class driver (1.1.1)
>>>
>>>
>>> The driver seems to find the integrated camera but gives the error
>>> message "No valid video chain found.". After that everything seems to
>>> be ok again except that there is no /dev/video0 entry made in the
>>> filesystem.
>>>
>>> I know that this camera is not listed in the list of supported devices
>>> (http://www.ideasonboard.org/uvc/#devices), but nevertheless I wonder
>>> if somebody here can tell me if there is a chance that this camera
>>> will be supported in near future or if there is a way I possibly can
>>> help myself ?
>>>
>>> Thanks and regards,
>>> Arno
>>>
>>>
>>> P.S.:  I attached the output of dmesg, uname and lsusb to  this
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