Harald Welte wrote: ... > Since the patches that I sent implement all this based on the framebuffer > blanking ioctl(), I could verify that unmodified xglamo (using 'xset s 5') > confirms the above measurements, i.e. it automatically goes down to 59mA. > > In percent, this is a 40% reduction of idle system power consumption, i.e. > in the case where you use the device as music player without any screen > output but CPU running.
Can we borrow any of this technique and apply it to the GTA01, or is the GTA01 code about as good as it gets? > The measurements should apply to both ASU and FSO, since both just used > backlight based blanking so far. ASU will directly benefit since it uses > the x screen blanking. > > FSO should switch the backlight control from the sysfs method to the > fbdev-ioctl method. It's backwards compatible to old kernels (which will just > backlight-blank) and future-compatible with kernels that add the jbt6k74 > notifier and glamo fb_blank() patches. I just checked, and Qt Extended also uses the backlight-based blanking, so that code should switch to the fbdev-ioctl method too. Regards, Mike (mwester)
