Use the flasher to put the phone in R&D mode with disabled watchdogs. Code: flasher-3.5 --set-rd-flags=no-lifeguard-reset --enable-rd-mode -R Then N900 will not reboot, connect to your network and to your N900 with SSH and switch portrait_wallpaper to false. Code: gconftool-2 --set /apps/osso/hildon-desktop/portrait_wallpaper -t bool false Now put N900 back into production mode with flasher. Code: flasher-3.5 --disable-rd-mode -R
flasher-3.5 --set-rd-flags=no-lifeguard-reset --enable-rd-mode -R
gconftool-2 --set /apps/osso/hildon-desktop/portrait_wallpaper -t bool false
flasher-3.5 --disable-rd-mode -R