Question on uvcvideo driver's power management:
Q1: We found some USB material mentioned : Relationship between ACPI
Dx states and USB PM states (active/suspended) is orthogonal.
Suspend/resume might not effect device Dx state(e.g. D0/D1/D3). Is it
a correct statement for general usb device and uvc
Hi, I am very curious about how v4l driver controls USB web camera's
power, e.g will it force device to a D3 low power state. Could anyone
show me which part of code is related with power management and is
there any wiki guide on V4l's power?
Thanks!
Samuel
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Hi, Pinchart:
Appreciate your possible comments on those dmesg info.
Samuel
2010/6/25 Samuel Xu :
> One correction: After make and make install, uvcvideo module can't
> auto loaded any more. I must manually "insmod uvcvideo.ko" to load it.
>
> Here is lsmod result,
4e1e3a ]---
[ 78.463064] uvcvideo: Failed to register video device (-22).
[ 78.463758] usbcore: registered new interface driver uvcvideo
[ 78.463774] USB Video Class driver (v0.1.0)
2010/6/25 Laurent Pinchart :
> Hi Samuel,
>
> On Friday 25 June 2010 11:25:13 Samuel Xu wrote:
>>
HI:
I am using a ASUS netbook with a USB 2.0 web camera (04f2:b071 Chicony
Electronics Co., Ltd 2.0M UVC WebCam / CNF7129)
I installed Linux, and the default uvcvideo.ko works (I tried
gstreamer-properties, which can find CNF7129 device and show correct
video camera test).
While I want to try the n
It is my first post to linux-media, sorry for NULL msg.
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