Openmoko Bug #2061: LCM (jbt6k74) doesn't go to sleep/deep_standby modes

Openmoko Public Trac bugs at
Tue Oct 7 14:49:41 CEST 2008

#2061: LCM (jbt6k74) doesn't go to sleep/deep_standby modes
 Reporter:  laforge          |          Owner:  laforge at
     Type:  enhancement      |         Status:  new                 
 Priority:  normal           |      Milestone:                      
Component:  System Software  |        Version:                      
 Severity:  blocker          |       Keywords:                      
Blockedby:                   |   Reproducible:  always              
 Blocking:                   |  
 The LCM itself supports three power modes, and the jbt6k74 driver exports
 the switch between the power modes to userspace.

 However, there seems to be no userspace power management to actually take
 care of doing this.

 Therefore, one suggested solution is to register with the framebuffer
 notifier and switch the LCM off whenever the backlight is switched off.

Ticket URL: <> <>
openmoko trac

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