Implications of disabling screensaver on K DX

JoeSchmoe007 · 03-22-2012, 07:24 PM

I have Kindle DX with software upgraded to 3.2.1

I recently learned that one can disable screensaver using " ~disableScreensaver" and I really prefer it with screensaver disabled.

Is there any downside to leaving screensaver off? Screen burn-in is probably not an issue

but it seems battery life is affected. Does it mean OS never goes to sleep anymore (as opposed to when screensaver was on)?

thomass · 03-23-2012, 05:02 AM

Quote:

Originally Posted by JoeSchmoe007

Does it mean OS never goes to sleep anymore (as opposed to when screensaver was on)?

Yes, this is the case.

hawhill · 03-23-2012, 05:57 AM

Really? I don't think so. It won't "sleep" - whatever that may be - in screensaver mode either. After some amount of inactivity the CPU will throttle its speed, but that's it. And that's independent of the screensaver, I think. But I don't think that there is a measurable difference in energy consumption between screensaver on and screensaver off.

The screensaver is rather a privacy enhancing optical thing. And makes people ask "what's that device, is it switched on" etc., so you can do the advertising for ebook readers :-)

thomass · 03-23-2012, 06:52 AM

Quote:

Originally Posted by hawhill

Really? I don't think so.

of course it is not the same thing with the sleep of a PC. But think about wireless, waiting for an input ...

HarryT · 03-23-2012, 07:09 AM

Quote:

Originally Posted by hawhill

But I don't think that there is a measurable difference in energy consumption between screensaver on and screensaver off.

That's correct. The main purpose is simply to lock the buttons to prevent you from accidentally turning pages. And, if you have 3G enabled, it turns it off.

hawhill · 03-23-2012, 07:33 AM

Ah, sorry, yes, I forgot about that wifi/wan switch-off. That's a strong point.

JoeSchmoe007 · 03-23-2012, 09:52 AM

Just FYI - I keep 3G off all the time. I think OS does go to some kind of sleep when screensaver is on. My reasoning is when screensaver is off you go back to DXG after a while and it responds instantly to key presses. However, it takes noticeable time to come back from sleep.

HarryT · 03-23-2012, 10:04 AM

Quote:

Originally Posted by hawhill

Ah, sorry, yes, I forgot about that wifi/wan switch-off. That's a strong point.

The DX doesn't have WiFi (it's a Kindle 2 with a 9.7" screen). Just 3G.

03-22-2012, 07:24 PM	#1
JoeSchmoe007 Member Posts: 14 Karma: 10 Join Date: Feb 2012 Device: Kindle DXG	Implications of disabling screensaver on K DX I have Kindle DX with software upgraded to 3.2.1 I recently learned that one can disable screensaver using " ~disableScreensaver" and I really prefer it with screensaver disabled. Is there any downside to leaving screensaver off? Screen burn-in is probably not an issue but it seems battery life is affected. Does it mean OS never goes to sleep anymore (as opposed to when screensaver was on)?

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03-23-2012, 05:57 AM	#3
hawhill Wizard Posts: 1,379 Karma: 2155307 Join Date: Nov 2010 Location: Goettingen, Germany Device: Kindle Paperwhite, Kobo Mini	Really? I don't think so. It won't "sleep" - whatever that may be - in screensaver mode either. After some amount of inactivity the CPU will throttle its speed, but that's it. And that's independent of the screensaver, I think. But I don't think that there is a measurable difference in energy consumption between screensaver on and screensaver off. The screensaver is rather a privacy enhancing optical thing. And makes people ask "what's that device, is it switched on" etc., so you can do the advertising for ebook readers :-)

03-23-2012, 07:33 AM	#6
hawhill Wizard Posts: 1,379 Karma: 2155307 Join Date: Nov 2010 Location: Goettingen, Germany Device: Kindle Paperwhite, Kobo Mini	Ah, sorry, yes, I forgot about that wifi/wan switch-off. That's a strong point.

03-23-2012, 09:52 AM	#7
JoeSchmoe007 Member Posts: 14 Karma: 10 Join Date: Feb 2012 Device: Kindle DXG	Just FYI - I keep 3G off all the time. I think OS does go to some kind of sleep when screensaver is on. My reasoning is when screensaver is off you go back to DXG after a while and it responds instantly to key presses. However, it takes noticeable time to come back from sleep.