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-   MeeGo / Harmattan (https://talk.maemo.org/forumdisplay.php?f=45)
-   -   [Announce] kernel-plus for Harmattan (https://talk.maemo.org/showthread.php?t=86543)

myname24 2013-11-26 09:18

Re: [Announce] kernel-plus for Harmattan
 
more than a year ago 16GB for 100$ and the new one cost now ~200$

nieldk 2013-11-26 09:19

Re: [Announce] kernel-plus for Harmattan
 
:) of course, I will disassemble it :P want that serial console

coderus 2013-11-26 09:23

Re: [Announce] kernel-plus for Harmattan
 
better modify sim tray with some connectors

nieldk 2013-11-26 09:25

Re: [Announce] kernel-plus for Harmattan
 
Quote:

Originally Posted by coderus (Post 1389072)
better modify sim tray with some connectors

I was thinking something like that. Might 'use' the headphone jack hehe, if possible

juiceme 2013-11-26 10:20

Re: [Announce] kernel-plus for Harmattan
 
Quote:

Originally Posted by nieldk (Post 1389073)
I was thinking something like that. Might 'use' the headphone jack hehe, if possible

I suggest the hacked simtray thing. Used that extensively before acquired another device which is now using permanent wired&soldered conections.

It is fairly easy to make an adapter that slots into the simcard hole. Only one thing you need to be careful; make the adapter so that it has a slot on the middle, or make it so thin that it does not bend the actual sim-connectors in the device. Doing that will give you problems later if the sim contacts do not connect well to the card.

Hurrian 2013-11-26 13:44

Re: [Announce] kernel-plus for Harmattan
 
Quote:

Originally Posted by juiceme (Post 1389080)
It is fairly easy to make an adapter that slots into the simcard hole.

Juice, if it's not too much to ask, what are the dimensions of the debug pads area? Saw the N9 with the physically hacked SIM tray; knowing how deep they go and how wide each pad is would help making an adapter :p

Quote:

Originally Posted by juiceme (Post 1389039)
If the voltage is cut it depends on the memory device on how long the old state is held in the device.

LPDDR SDRAM holds the data for quite some time - VRAM glitches on Nemo N900 once spewed out some remaining bitmaps from Maemo 5 ;)

What I'm concerned about though, is that ubiboot logging to the RAM buffer would overwrite whatever's remaining in RAM.

The copy code would have to be placed really early in boot, maybe to a procfs entry, subsequently copied when ubiboot-menus is launched.

juiceme 2013-11-26 22:36

Re: [Announce] kernel-plus for Harmattan
 
Quote:

Originally Posted by Hurrian (Post 1389106)
Juice, if it's not too much to ask, what are the dimensions of the debug pads area? Saw the N9 with the physically hacked SIM tray; knowing how deep they go and how wide each pad is would help making an adapter :p

I'll have to measure those, the pads are fairly large ans I made my first adapter by just guessing at the dimensions and filing the bits until they fit nicely :)


Quote:

Originally Posted by Hurrian (Post 1389106)
LPDDR SDRAM holds the data for quite some time - VRAM glitches on Nemo N900 once spewed out some remaining bitmaps from Maemo 5 ;)

What I'm concerned about though, is that ubiboot logging to the RAM buffer would overwrite whatever's remaining in RAM.

The copy code would have to be placed really early in boot, maybe to a procfs entry, subsequently copied when ubiboot-menus is launched.

That takes some studying but it should not be too difficult to ensure there's no overwriting. I had to shuffle the kernel bits around in the latest ubiboot kernel anyway to get the modules load under the 16M limit from the main kernel block.

---- edit -----

Something I thought of today triggered when I thought about the status led flickering in R&D mode... I think it just shows up CPU activity, right?

Well. why not make the status led function as serial output!
That'd be lot easier than using the AUX output, since you'd not need any fancy modulation schemes and the bandwidth would be eornomous :D

You'd just need a photodiode hookup that you'd place on top of the led, converting it directly to serial signal wired to PC :D:D

nieldk 2013-11-27 11:33

Re: [Announce] kernel-plus for Harmattan
 
Quote:

Originally Posted by juiceme (Post 1389202)
Something I thought of today triggered when I thought about the status led flickering in R&D mode... I think it just shows up CPU activity, right?

Well. why not make the status led function as serial output!
That'd be lot easier than using the AUX output, since you'd not need any fancy modulation schemes and the bandwidth would be eornomous :D

You'd just need a photodiode hookup that you'd place on top of the led, converting it directly to serial signal wired to PC :D:D

What an awesome idea :) Shouldnt be to hard to implement. Well, kinda'

nieldk 2013-11-27 12:34

Re: [Announce] kernel-plus for Harmattan
 
@hurrian One thing. The iptables redirect () seems to have gone haywire in cyberspace again :)

http://talk.maemo.org/showpost.php?p...5&postcount=42

At least, again this message shows up e.g. in ettercap:

iptables: No chain/target/match by that name.

Which is connected to CONFIG_IP_NF_TARGET_REDIRECT

Hurrian 2013-11-28 10:04

Re: [Announce] kernel-plus for Harmattan
 
Quote:

Originally Posted by nieldk (Post 1389294)
@hurrian One thing. The iptables redirect () seems to have gone haywire in cyberspace again :)

At least, again this message shows up e.g. in ettercap:

iptables: No chain/target/match by that name.

Which is connected to CONFIG_IP_NF_TARGET_REDIRECT

Enabled [M]. See first post for details!

kernel-plus 2.6.32.61 r6 focuses on btrfs. It has been enabled as [Y] in the kernel.

Note that the disk format as used in the kernel probably matches 2.6.34 - ubiboot definitely has not been updated to support reading from this version of the btrfs disk format. Play with /home or something.
Meanwhile, or if you're feeling adventurous, load zImage from somewhere other than the Harmattan rootfs (check ubiboot.conf)


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