AnsweredAssumed Answered 25 linux power management issue  with Xfbdev -keybd

Question asked by ramakrishna rao on May 20, 2013

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 is device 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,