Hack-A-N900/Usb Recovery Mode: Unterschied zwischen den Versionen
Amir (Diskussion | Beiträge) |
Hmw (Diskussion | Beiträge) (→Enable R&D mode and disable watchdogs: Link to flasher web site added) |
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| − | I bricked my maemo setup several times. Often the underlying problem would have been trivial to fix, if i had a way to access the | + | I bricked my maemo setup several times. Often the underlying problem would have been trivial to fix, if i had a way to access the rootfs. Patching bootmenu enables us to boot a minimal system with just usb network and sshd enabled. that's still not optimal because this solution relies on rootfs being accessible. why? - [http://www.mail-archive.com/maemo-developers@maemo.org/msg22365.html 1] [https://bugs.maemo.org/show_bug.cgi?id=6468 2] - in short, during boot process no seperate initrd is utilized - in fact the rootfs is misused for it -.- . the bootmenu script circumvents that by redirecting the pivot_root call issued by /sbin/preinit, which is a pretty dirty - yet effective hack. <i>hmmm... just an idea, but why not use the rootfs for initrd purposes only?...</i> |
| + | sshd will be using settings from the rootfs. | ||
| + | |||
=== Prerequisites === | === Prerequisites === | ||
* [http://metalab.at/wiki/Hack-A-N900/First_Steps First Steps] | * [http://metalab.at/wiki/Hack-A-N900/First_Steps First Steps] | ||
| + | * [http://metalab.at/wiki/Hack-A-N900/Development Development] - Software sources for apt, installing "patch". | ||
== Install bootmenu == | == Install bootmenu == | ||
| Zeile 8: | Zeile 11: | ||
<pre> | <pre> | ||
| − | # Get the bootmenu | + | # Get the bootmenu package: |
wget http://www.daimi.au.dk/~cvm/bootmenu_1.6_armel.deb | wget http://www.daimi.au.dk/~cvm/bootmenu_1.6_armel.deb | ||
| Zeile 29: | Zeile 32: | ||
# IP address for USB networking | # IP address for USB networking | ||
USB_IP=192.168.2.15 | USB_IP=192.168.2.15 | ||
| + | </pre> | ||
| + | |||
| + | == Enable R&D mode and disable watchdogs == | ||
| + | Enable [http://wiki.maemo.org/Flasher flasher mode] and execute following on your pc: | ||
| + | <pre> | ||
| + | ./flasher-3.5 --set-rd-flags=no-omap-wd | ||
| + | ./flasher-3.5 --set-rd-flags=no-ext-wd | ||
| + | ./flasher-3.5 --enable-rd-mode | ||
</pre> | </pre> | ||
| Zeile 34: | Zeile 45: | ||
Reboot the device with the keyboard slide out(!). | Reboot the device with the keyboard slide out(!). | ||
When the boot menu appears you can either select a boot entry or press "CTRL" to boot usb recovery mode. | When the boot menu appears you can either select a boot entry or press "CTRL" to boot usb recovery mode. | ||
| + | |||
| + | [[Kategorie:N900]] | ||
Aktuelle Version vom 28. September 2012, 08:52 Uhr
I bricked my maemo setup several times. Often the underlying problem would have been trivial to fix, if i had a way to access the rootfs. Patching bootmenu enables us to boot a minimal system with just usb network and sshd enabled. that's still not optimal because this solution relies on rootfs being accessible. why? - 1 2 - in short, during boot process no seperate initrd is utilized - in fact the rootfs is misused for it -.- . the bootmenu script circumvents that by redirecting the pivot_root call issued by /sbin/preinit, which is a pretty dirty - yet effective hack. hmmm... just an idea, but why not use the rootfs for initrd purposes only?... sshd will be using settings from the rootfs.
Prerequisites
- First Steps
- Development - Software sources for apt, installing "patch".
Login via ssh to your n900 and:
# Get the bootmenu package: wget http://www.daimi.au.dk/~cvm/bootmenu_1.6_armel.deb # Install bootmenu package dpkg -i bootmenu_1.6_armel.deb # Install bootmenu script install_bootmenu
Patch bootmenu.sh to fix key bindings and enable usb recovery mode
cd / wget http://metalab.at/wiki/images/4/40/Bootmenu_n900usbrecov.patch patch -p0 < Bootmenu_n900usbrecov.patch
If you like you can edit /bootmenu.conf and adjust the ip address the usb interface will start with in recovery mode:
# IP address for USB networking USB_IP=192.168.2.15
Enable R&D mode and disable watchdogs
Enable flasher mode and execute following on your pc:
./flasher-3.5 --set-rd-flags=no-omap-wd ./flasher-3.5 --set-rd-flags=no-ext-wd ./flasher-3.5 --enable-rd-mode
Boot into recovery mode
Reboot the device with the keyboard slide out(!). When the boot menu appears you can either select a boot entry or press "CTRL" to boot usb recovery mode.
