OESF Portables Forum

Everything Else => Sharp Zaurus => Model Specific Forums => Distros, Development, and Model Specific Forums => Archived Forums => 6000 - Tosa => Topic started by: GoLinux on November 02, 2004, 01:23:17 pm

Title: UNDERCLOCK SL-6000L
Post by: GoLinux on November 02, 2004, 01:23:17 pm

Is there any safe application available to control the clock of the SL-6000L CPU? I know some exist for the SL-5600 and SL-C7/8xx, has anybody tested one of those on the SL-6000L?

I'm not really interested in overclocking my Z, actually I want to do the opposite when using it for non processor-intensive tasks, like checking Calendar and reading e-books.

If the clock could be slowed down to ~100MHz, there would probably be a measurable impact on battery life. I could use some more of that....

Thanks.

Title: UNDERCLOCK SL-6000L
Post by: mjalkut on November 02, 2004, 03:05:14 pm

The xscale processor should already be scaling down when it can.  Shouldn't it?

Title: UNDERCLOCK SL-6000L
Post by: guylhem on November 03, 2004, 05:54:29 pm

Intructions on :
http://externe.net/zaurus/modules.php?op=m...=article&sid=18 (http://externe.net/zaurus/modules.php?op=modload&name=News&file=article&sid=18)

files on:
externe.net/zaurus/kernel

I use downclocking to use my Z as a cellphone with an audiovox rtm8000

Title: UNDERCLOCK SL-6000L
Post by: GoLinux on November 04, 2004, 09:56:55 am

guylhem,

thanks for your suggestion. It looks a little too "radical" though.... If I understand correctly the instructions, you are talking about replacing the kernel.

I'm looking for something a bit less extreme, like a small stand-alone utility.

Searching the internet I found an ipk file for an applet called "freqchangeapplet_0.1_arm.ipk".

Does anybody know if such an applet would work on the SL-6000L with the standard Sharp ROM and if it requires anything else to work? The feed where I found it is for the SLC7/8xx series.

Thanks for any inputs, Paolo.

Title: UNDERCLOCK SL-6000L
Post by: tumnus on November 04, 2004, 10:17:56 am

If you do not have a virtual file called /proc/cccr_change then you cannot change the clock speed on your 6000.

All the other XScale zauruses need a patched kernel because Sharp didn't enable this feature in their kernel.

Title: UNDERCLOCK SL-6000L
Post by: guylhem on November 04, 2004, 12:36:08 pm

Correct - you need to flash the kernel anyway. I use my new kernel daily, without any problem (except the one I already have with the old kernel, like qte crashing on some qcop instructions :-)

I recommand using the battery applet instead of freqchangeapplet, which doesn't look good on the 6000 screen. Moreover, the battery applet can be called from a click on the taskbar (no need to start any app) and automatically set the cpu speed to the one you want when some conditions are reached (ex: charging, low battery)

Title: UNDERCLOCK SL-6000L
Post by: GoLinux on November 04, 2004, 04:16:26 pm

guylhem & tumnus,

so you are saying that, look aside,  even the freqchangeapplet_0.1_arm.ipk won't work without the new kernel or the /proc/cccr_change virtual file?

Okay, if I find the courage I'll flash the Z with the new Kernel..... I know, if done with the proper attention is not a big deal. I guess I'm just being too anxious over my new SL-6000L.  

Thanks.