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Green Hawk

Member

Registered: 2010-03-20

Posts: 2

Webcam troubles Acer Aspire One

I have strange webcam behaviour on me Acer Aspire One A110
After netbook turn on, it works fine till closing netbook cover. After this skype, cheese, xawtv don't shows anything till reboot.

Right after turning on
dmesg

input: Acer Crystal Eye webcam as /devices/pci0000:00/0000:00:1d.7/usb1/1-5/1-5:1.0/input/input9
usbcore: registered new interface driver uvcvideo
USB Video Class driver (v0.1.0)

lsusb

Bus 001 Device 002: ID 064e:d101 Suyin Corp. Acer CrystalEye Webcam
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Closing and open netbook cover

Mar 20 09:05:05 greenhawk kernel: usb 1-5: USB disconnect, address 2
Mar 20 09:05:05 greenhawk kernel: usb 1-5: new high speed USB device using ehci_hcd and address 3
Mar 20 09:05:05 greenhawk kernel: usb 4-1: new full speed USB device using uhci_hcd and address 2
Mar 20 09:05:05 greenhawk kernel: usb 4-1: not running at top speed; connect to a high speed hub
Mar 20 09:05:06 greenhawk kernel: usb 4-1: configuration #1 chosen from 1 choice
Mar 20 09:05:06 greenhawk kernel: uvcvideo: Found UVC 1.00 device Acer Crystal Eye webcam (064e:d101)
Mar 20 09:05:06 greenhawk kernel: input: Acer Crystal Eye webcam as /devices/pci0000:00/0000:00:1d.2/usb4/4-1/4-1:1.0/input/input11

lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 064e:d101 Suyin Corp. Acer CrystalEye Webcam
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Note: bus and Device changed 1:2 to 4:2

And that's all - webcam not operational till reboot

cheese -v

Cheese 2.28.1 
Probing devices with HAL...
Found device 064e:d101, getting capabilities...
Detected v4l2 device: Acer Crystal Eye webcam
Driver: uvcvideo, version: 256
Capabilities: 0x04000001

Probing supported video formats...
libv4l2: error turning on stream: Ошибка ввода/вывода (Input/Output Error on Russian)

Any advices to solve this?
PS: Sorry for ugly English, not my native

Green Hawk

Member

Registered: 2010-03-20

Posts: 2

Re: Webcam troubles Acer Aspire One

Additional information
I made two lsusb -s b:d -v dumps before and just after netbook cover closing. There are results:

diff ./acer_before.lsusb ./acer_after.lsusb 
2c2
< Bus 001 Device 003: ID 064e:d101 Suyin Corp. Acer CrystalEye Webcam
---
> Bus 004 Device 002: ID 064e:d101 Suyin Corp. Acer CrystalEye Webcam
277c277
<         wMaxPacketSize     0x1400  3x 1024 bytes
---
>         wMaxPacketSize     0x03ff  1x 1023 bytes
297c297
<         wMaxPacketSize     0x1400  3x 1024 bytes
---
>         wMaxPacketSize     0x0200  1x 512 bytes
317c317
<         wMaxPacketSize     0x1400  3x 1024 bytes
---
>         wMaxPacketSize     0x0180  1x 384 bytes

As you can see, magicaly sizes of data packets was changed