Some progress...

It seems that the problem is with Ubuntu, because if I use Windows XP and that is on a VirtualBox, running on the same Ubuntu 10.04 I can load the kernel, but after that device just reboots and nothing happens

Yes, I prepared the SD card and the battery cover is on, just like the wiki says.

[CODE]
C:\Internet\Download\MeeGo\images>"c:\Program Files\maemo\flasher-3.5\flasher-3.
5.exe" -l -k meego-handset-armv7l-n900-1.1.80.1.20101012.1-vmlinuz-2.6.35.3-8.8-
n900 -b
flasher v2.5.2 (Sep 24 2009)

USB device found found at bus bus-0, device address \\.\libusb0-0001--0x0421-0x0
105.
Found device RX-51, hardware revision 2101
NOLO version 1.4.14
Version of 'sw-release': RX-51_2009SE_10.2010.19-1_PR_MR0
Sending kernel image (1563 kB)...
100% (1563 of 0 kB, avg. 1563 kB/s)
[\CODE]

Any idea?

Thanks,
Matej