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CommanderROR · 03-11-2007, 12:48 PM

I use 30Mhz

Seems to work fine and I can hardly feel the difference in performance so far...but i'm not actively using the device, so I only have a very limited picture. Paging is OK however.

I'm now well past the 15hours mark and the Iliad is still running...^^

UPDATE:

The Iliad just stopped responing. It must have lost power sometime in the last 5 minutes. That makes the total uptime around 15:30 hours. Not really great, but a nice improvement over the standard configuration.

The next steps now would be to add voltage scaling and of course link the script into the iPDF launch. Turning pages at 30Mhz is absolutely OK, no need to scale the processor up again. I could really live with the Iliad running at 30Mhz all the time actually since it does not seem to make that much of a difference in laoding times for iPDF either...but somebody will have to look into that more closely...

UPDATE:

I don't know anything about programming, but there seem to be lots of websites with information about implementing powersaving for PXA255 under Linux, like here:
http://www.applieddata.net/forums/to...?TOPIC_ID=2082

03-11-2007, 12:48 PM	#15
CommanderROR eink fanatic Posts: 2,022 Karma: 4924 Join Date: Mar 2006 Location: Germany Device: STAReBOOK, iRex Iliad, Sony 505, Kindle 2	I use 30Mhz Seems to work fine and I can hardly feel the difference in performance so far...but i'm not actively using the device, so I only have a very limited picture. Paging is OK however. I'm now well past the 15hours mark and the Iliad is still running...^^ UPDATE: The Iliad just stopped responing. It must have lost power sometime in the last 5 minutes. That makes the total uptime around 15:30 hours. Not really great, but a nice improvement over the standard configuration. The next steps now would be to add voltage scaling and of course link the script into the iPDF launch. Turning pages at 30Mhz is absolutely OK, no need to scale the processor up again. I could really live with the Iliad running at 30Mhz all the time actually since it does not seem to make that much of a difference in laoding times for iPDF either...but somebody will have to look into that more closely... UPDATE: I don't know anything about programming, but there seem to be lots of websites with information about implementing powersaving for PXA255 under Linux, like here: http://www.applieddata.net/forums/to...?TOPIC_ID=2082