2009-02-27 22:54:06     QT and standby mode

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2009-02-27 22:54:06     QT and standby mode

Dzung Dang (VIET NAM)

Message: 70127   

 

Dear all,

 

  I am using 2008R1.5 release and QT Embedded 3.5.5.

 

I am trying to use standby mode for saving power. I follow the website instruction for user application.

 

http://docs.blackfin.uclinux.org/doku.php?id=power_management_support

 

The standby mode works well with console program. But for QT program, after waking up, the program hang.

 

Can anyone tell me how to config QT to work with standby mode?

 

Thanks a lot.

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2009-02-28 10:14:40     Re: QT and standby mode

Robin Getz (UNITED STATES)

Message: 70161   

 

Dzung:

 

Any application hangs? or just Qt ones?

 

-Robin

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2009-03-01 22:05:53     Re: QT and standby mode

Dzung Dang (VIET NAM)

Message: 70187   

 

Hi Robin,

 

Only QT application hangs. Other programs continued to work after waking up from standby mode.

 

Dzung

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2009-03-01 22:49:57     Re: QT and standby mode

Robin Getz (UNITED STATES)

Message: 70188   

 

Dzung:

 

From userspace - it shouldn't matter. (in theory)

 

Can you try something that is active on the display? What display driver are you using? and does it handle suspend/resume properly?

 

-Robin

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2009-03-02 00:02:06     Re: QT and standby mode

Dzung Dang (VIET NAM)

Message: 70190   

 

Hi Robin,

 

  I am using board CM-BF561 from Bluetechnix with Hitachi TX09D70VM1CDA TFT LCD. The orginal driver is not synchronous when suspend ( the clock and power still on). So that I modified the driver to turn off the TFT LCD during standby. With new driver, I have tested a program display some pics on TFT  and it woked well after waking up from standby. So  I think the problem is from QT.

 

Dzung.

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