Yesterday I bought a secondhand N900. I just upgraded it to PWNPHONE. Very nice, but it's not the speed of what I'm used to have. Doesn't matter, I bought it just for entertainment and educational purposes. But it just crossed my mind (perhaps a tad too late) can I just revert back to Maemo with the flashing method? Or did the procedure change more than just these two *.bin's?

Same 2 bins (emmc and firmware)

Ok. So just to be sure, just flash firmware, flash eMMC NO REBOOT REMOVE BATTERY, and at last flash firmware again?

Emmc , firmware (some are suggesting emmc again) haven't tried that tho

No.

First eMMC/vanilla, then firmware/fiasco.
In rare cases: firmware, eMMC, firmware.

All done without reboots in between.

--edit
of course alecsandru was correct by saying emmc then firmware

Well, better try this now before I get used to all the customizations I'm adding... I didn't dare to flash eMMC before because it was said there were severe risks. Got my new setup polluted with old stuff from the kid that I bought it from, so I better start over.

Here goes... Wish me luck!

Some phones remain stucked at 20% while flashing emmc

Mine doesn't even start flashing the eMMC... Guess there's some driver malfunction... Tried to flash firmware after that, went well, boots into the original Maemo 5. (RX-51_2009SE_20.2010.36-2_PR_COMBINED_MR0_ARM.bin the most recent? A good basis for PWNPHONE?)

Do I need the PC Suite driver for this to go well? Not sure if it has that driver, trying to find out now...

-edit-

So this is what happens (I'm hesitant to continue, don't want to brick it yet):

I enter:
flasher-3.5.exe -F RX-51_2009SE_10.2010.13-2.VANILLA_PR_EMMC_MR0_ARM.bin -f

"Waiting for device"

I'm holding U, plugging in, USB connect/disconnect sounds, "Found device RX-51 ... Booting device into flash mode.
Suitable USB device not found, waiting."

Meanwhile the N900 has the faint NOKIA logo, but doesn't have the USB logo in the top right corner. All this time I'm holding 'U'. The computer shows N900 (PC Suite mode), but needs drivers.

I corrected the driver issue, but is this the correct behavior?

-edit2-

Guess it was the correct behavior; eMMC flashed fine. Now flashing firmware...

And that went well.

To help others (and myself, because I'm sure I'll forget about this in a week)) in the future: I used this to correct the driver issues in Win7, 32-bit (yes, my 32-bit didn't accept it out of the box...).

-edit3-

Ah, I'm completely fresh and new. Now it's time to install the PWNPHONE stuff, again. Thanks for helping me solve this!

-edit4-

After starting the PWNPHONE stuff for the second time, it only needed a minute to copy all the stuff, not an hour. After that it gets you back to the BackupMenu 0.65 and errors. Guess something went wrong... Back to the lab...

-edit5-

I'm writing a book here... Anyway, I guess it installed all kinds of stuff onto the MicroSD which I didn't format/etcetera. So back to square one: flash eMMC, flash fw, format microSD, extract PWNPHONE image tarball and try installing again.

Pwnphpne stuf can be installed on top of maemo cssu ? Tried that?

That last install worked like a charm!

It said in the PWNPHONE instructions, use the latest Nokia firmware, but it didn't specify an exact build. What are the possible firmwares to choose from? What's the difference between the latest Nokia and the CSSU? It's a little tricky for me, I'm not familiar with N900 so it's all new. If you want something tested; point me in the direction of a build I can try it for you.

Can I brick the device this way, or am I always able to go back to original stock firmware?