Mounting RW rootfs for modprobe hid-multitouch at boot

[m***@public.gmane.org]

Hi, i'm trying to insert a script that load the module *hid-multitouch* at
boot, but without success.

I can't write the rootfs even if i turn the rootfs verification off:


1. make_dev_ssd.sh --force --remove_root_fs
2. mount -o remount,rw /


mount: cannot remount block device /dev/ROOT read-write, is write-protected

[ 517.394412] EXT4-fs (sda3): couldn't mount RDWR because of unsupported optional features (ff000000)
[ 529.552300] EXT4-fs (sda3): couldn't mount RDWR because of unsupported optional features (ff000000)
[ 600.032221] EXT4-fs (sda3): couldn't mount RDWR because of unsupported optional features (ff000000)

e2fsck 1.42 (29-Nov-2011)
/dev/sda3 has unsupported feature(s): FEATURE_R24 FEATURE_R25 FEATURE_R26 FEATURE_R27 FEATURE_R28 FEATURE_R29 FEATURE_R30 FEATURE_R31
e2fsck: Get a newer version of e2fsck!

debugfs 1.42 (29-Nov-2011)
/dev/sda3: Filesystem has unsupported read-only feature(s) while opening filesystem
debugfs: feature -FEATURE_R24
feature: Filesystem not open
debugfs: quit

Chrome version: 29.0.1547.74 Channel: stable
OS Version: 3.4.0
Kernel /proc/cmdline
quiet console=tty2 init=/sbin/init boot=local rootwait noresume noswap loglevel=1 noinitrd root=/dev/sda3
i915.modeset=1 cros_legacy cros_debug BOOT_IMAGE=vmlinuz.A


Linux localhost 3.4.0 #1 SMP Thu Sep 12 16:21:50 PDT 2013 x86_64 Intel(R) Atom(TM) CPU D525 @ 1.80GHz GenuineIntel GNU/Linux



If I try to mount in rw at bootloader the system hangs, any suggestions? :)

Thanks in advance.

Cheers

[m***@public.gmane.org]

I mistyped the command in the issue but it was correct at the terminal, my bad.

Some more infos:
This is the output with --remove_rootfs_verification

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! INFO: ALL SANITY CHECKS WERE BYPASSED. YOU ARE ON YOUR OWN. !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


Start in 5 second(s) (^C to abort)...
Start in 4 second(s) (^C to abort)...
Start in 3 second(s) (^C to abort)...
Start in 2 second(s) (^C to abort)...
Start in 1 second(s) (^C to abort)...
Kernel A: Disabled rootfs verification.
Backup of Kernel A is stored in: /mnt/stateful_partition/backups/kernel_A_20131216_031643.bin
Kernel A: Re-signed with developer keys successfully.
Kernel B: Disabled rootfs verification.
Backup of Kernel B is stored in: /mnt/stateful_partition/backups/kernel_B_20131216_031645.bin
Kernel B: Re-signed with developer keys successfully.
Successfully re-signed 2 of 2 kernel(s) on device /dev/sda.

At the reboot I still get the mount read-only error.

mount -o remount, rw /
mount: you must specify the filesystem type

mount -t ext2 -o remount, rw /
mount: cannot remount block device rw read-write, is write-protected

mount -t ext4 -o remount, rw /
mount: cannot remount block device rw read-write, is write-protected

[ 24.066179] EXT4-fs (sda3): couldn't mount RDWR because of unsupported optional features (ff000000)
[ 30.056144] EXT4-fs (sda3): couldn't mount RDWR because of unsupported optional features (ff000000)
[ 46.912226] EXT4-fs (sda3): couldn't mount RDWR because of unsupported optional features (ff000000)
[ 302.048034] EXT4-fs (sda3): error count: 13
[ 302.048042] EXT4-fs (sda3): initial error at 1386694180: ext4_map_blocks:544: inode 32786: block 1577058816
[ 302.048053] EXT4-fs (sda3): last error at 1386694194: ext4_map_blocks:544: inode 32786: block 486998326


Full dmesg in attachment.
Cheers

[Mike Frysinger]

when you run build_image, pass the --noenable_rootfs_verification flag to
create a rootfs w/out verification enabled
-mike

Hi, i'm trying to insert a script that load the module *hid-multitouch*at boot, but without success.
1. make_dev_ssd.sh --force --remove_root_fs
2. mount -o remount,rw /
mount: cannot remount block device /dev/ROOT read-write, is write-protected
[ 517.394412] EXT4-fs (sda3): couldn't mount RDWR because of unsupported optional features (ff000000)
[ 529.552300] EXT4-fs (sda3): couldn't mount RDWR because of unsupported optional features (ff000000)
[ 600.032221] EXT4-fs (sda3): couldn't mount RDWR because of unsupported optional features (ff000000)
e2fsck 1.42 (29-Nov-2011)
/dev/sda3 has unsupported feature(s): FEATURE_R24 FEATURE_R25 FEATURE_R26 FEATURE_R27 FEATURE_R28 FEATURE_R29 FEATURE_R30 FEATURE_R31
e2fsck: Get a newer version of e2fsck!
debugfs 1.42 (29-Nov-2011)
/dev/sda3: Filesystem has unsupported read-only feature(s) while opening filesystem
debugfs: feature -FEATURE_R24
feature: Filesystem not open
debugfs: quit
Chrome version: 29.0.1547.74 Channel: stable
OS Version: 3.4.0
Kernel /proc/cmdline
quiet console=tty2 init=/sbin/init boot=local rootwait noresume noswap loglevel=1 noinitrd root=/dev/sda3
i915.modeset=1 cros_legacy cros_debug BOOT_IMAGE=vmlinuz.A
If I try to mount in rw at bootloader the system hangs, any suggestions? :)
Thanks in advance.
Cheers
--
--
http://groups.google.com/a/chromium.org/group/chromium-os-discuss?hl=en

[DennisLfromGA]

@m...-***@public.gmane.org

I use -

sudo mount -i -o remount,rw / || bash ~/bin/rw-rootfs

in my .bashrc and it mounts without a problem *unless* chromeos was
upgraded at which point it fails and runs my rw-rootfs script that does
this -

CURRENTROOT=`rootdev -s`
if [ $CURRENTROOT = /dev/sda3 ]; then CURRENTKERNEL=2; else
CURRENTKERNEL=4; fi
sudo /usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification
--partitions $CURRENTKERNEL

This has worked well for me and I still get updates...

Post by m***@public.gmane.org
At the reboot I still get the mount read-only error.
mount -o remount, rw /
mount: you must specify the filesystem type
mount -t ext2 -o remount, rw /
mount: cannot remount block device rw read-write, is write-protected
mount -t ext4 -o remount, rw /
mount: cannot remount block device rw read-write, is write-protected