This is a bug report for gspca_zc3xx v.2.14.0 webcam driver installed as a
module on ArchLinux plug computer, kernel 3.5.2-1-ARCH
[root@alarm ~]# dmesg
[ 15.271381] gspca_main: v2.14.0 registered
[ 15.303224] gspca_main: gspca_zc3xx-2.14.0 probing 046d:08d7
[ 16.211715] fuse init (API version 7.19)
[ 16.461436] input: gspca_zc3xx as
/devices/platform/orion-ehci.0/usb1/1-1/1-1.4/input/input0
[ 16.469635] usbcore: registered new interface driver snd-usb-audio
[ 16.470642] usbcore: registered new interface driver gspca_zc3xx
[root@alarm ~]# lsusb
Bus 001 Device 004: ID 046d:08d7 Logitech, Inc. QuickCam Communicate STX
[root@alarm ~]# v4lctl list
attribute | type | current | default | comment
-----------+--------+---------+---------+-------------------------------------
norm | choice | (null) | (null) |
input | choice | gspca_z | gspca_z | gspca_zc3xx
bright | int | 128 | 128 | range is 0 => 255
contrast | int | 128 | 128 | range is 0 => 255
Gamma | int | 4 | 4 | range is 1 => 6
Exposure | int | 2343 | 2343 | range is 781 => 18750
Gain, Auto | bool | on | on |
Power Line | choice | Disable | Disable | Disabled 50 Hz 60 Hz
Sharpness | int | 2 | 2 | range is 0 => 3
The above output is complete, there is nothing else coming from dmesg.
In Windows 7 64-bit with the webcam connected, while running Logitech
Webcam Software, shows some extra info:
Logitech QuickCam Communicate STX
Hardware ID USB\VID_046D&PID_08D7&REV_0100&MI_00
Procmon output for LWS.exe (from Registry):
ZC0302 chipset, Image Sensor HV7131B
Attached to this message are exported webcam Registry settings (default
and factual), and controls available for the webcam and optimally set by
LWS. Also attached are datasheets for the webcam chipset and image sensor.
The main problems now are:
- Image Sensor can't be identified by gspca_zc3xx driver or verified by
user since
not shown in dmesg
- Auto Gain is switched off permanently (despite shown On), and its choice
range is missing
- Color Saturation and White Balance controls are absent
- Changes in image are unnoticed when adjusting Brightness and Contrast
within their full range
The webcam works with exposure and other adjustments manually changed over
the day, but very difficult to get quality image in evening low light.
See also the discussion
(https://bbs.archlinux.org/viewtopic.php?pid=879810#p879810) on how
varying the driver's settings ("quality" and other) affects controls
responsiveness ("brightness" and "contrast") and perceived image quality.
Thanks,
SamÿþK e y N a m e :
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C l a s s N a m e : <