AnsweredAssumed Answered

i.mx 25 linux power management issue  with Xfbdev -keybd

Question asked by ramakrishna rao on May 18, 2013
Latest reply on May 20, 2013 by Paul Kuhn

Dear all,

             We are facing linux power management failures .Our h/w and s/w details are

 

                   ARM                   --------      i.mx25

                   LTIB                    --------     L2.6.35-11-01-00_ER

                   Linux kernel         --------     Linux - 2.6.31

                   Cross compiler     --------     arm-none-linux-gnueabi-* ( version-4.4.4)

 

          We make the LTIB for Gnome desktop environment.For normal follow it was working fine.

But when we are using the Power management (echo mem > /sys/power/state) our device going to sleep.

But after wakeup  'Xfbdev' not resuming properly.

 

Our Xfbdev cmd is

          "Xfbdev -mouse tslib,2,device=/dev/input/ts0 -keybd keyboard,,device=/dev/input/event0"

 

What we observe that, when we pass "-keybd keyboard,,device=/dev/input/event0"  to Xfbdev resuming fails

(This event0 our devise specific keyboard event ).

 

We checked linux standardised usb keyboard driver along with lenovo usb keyboard ,but same issue appears.

 

Note : If we kill the Xfbdev and run once again  its working normally.If we again going  to Power management Xfbdev resuming  fails.

 

Thanks and regards,

Kilaru.Ramakrishna Rao

Visiontek Pvt ltd.

India.

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