[Xperia Arc Android Development] Hotfingers:
Hi @gu5t3r,

Tried the work-around, and got no joy.

So I tried the commands that you asked while I still had v11 loaded....

/system/xbin/busybox

BusyBox v1.20.2-jb static (2012-11-25 17:47 +0100) multi-call binary.
Copyright (C) 1998-2012 Erik Andersen, Rob Landley, Denys Vlasenko
and others. Licensed under GPLv2. Merged for bionic by tpruvot@github
See source distribution for full notice.

Usage: busybox [function [arguments]...]
or: busybox --list
or: function [arguments]...

BusyBox is a multi-call binary that combines many common Unix
utilities into a single executable. Most people will create a
link to busybox for each function they wish to use and BusyBox
will act like whatever it was invoked as.

Currently defined functions:
[, [[, adjtimex, arp, ash, awk, base64, basename, bbconfig, blkid,
blockdev, brctl, bunzip2, bzcat, bzip2, cal, cat, catv, chattr, chgrp,
chmod, chown, chroot, clear, cmp, comm, cp, cpio, crond, crontab, cut,
date, dc, dd, depmod, devmem, df, diff, dirname, dmesg, dnsd, dos2unix,
du, echo, ed, egrep, env, expand, expr, false, fbsplash, fdisk, fgrep,
find, flash_lock, flash_unlock, flashcp, flock, fold, free,
freeramdisk, fsync, ftpget, ftpput, fuser, getopt, grep, groups,
gunzip, gzip, halt, head, hexdump, id, ifconfig, inetd, insmod,
install, ionice, iostat, ip, kill, killall, killall5, less, ln,
losetup, ls, lsattr, lsmod, lsof, lsusb, lzcat, lzma, lzop, lzopcat,
man, md5sum, mesg, mkdir, mkdosfs, mke2fs, mkfifo, mkfs.ext2,
mkfs.vfat, mknod, mkswap, mktemp, modinfo, modprobe, more, mount,
mountpoint, mpstat, mv, nanddump, nandwrite, nbd-client, nc, netstat,
nice, nohup, nslookup, ntpd, od, patch, pgrep, pidof, ping,
pipe_progress, pkill, pmap, poweroff, printenv, printf, ps, pstree,
pwd, pwdx, rdev, readlink, realpath, reboot, renice, reset, resize,
rev, rm, rmdir, rmmod, route, run-parts, rx, sed, seq, setconsole,
setserial, setsid, sh, sha1sum, sha256sum, sha512sum, sleep, sort,
split, stat, strings, stty, sum, swapoff, swapon, sync, sysctl, tac,
tail, tar, taskset, tee, telnet, telnetd, test, tftp, tftpd, time,
timeout, top, touch, tr, traceroute, true, ttysize, tune2fs, umount,
uname, uncompress, unexpand, uniq, unix2dos, unlzma, unlzop, unxz,
unzip, uptime, usleep, uudecode, uuencode, vi, watch, wc, wget, which,
whoami, xargs, xz, xzcat, yes, zcat

/system/xbin/busybox --list

[
[[
adjtimex
arp
ash
awk
base64
basename
bbconfig
blkid
blockdev
brctl
bunzip2
bzcat
bzip2
cal
cat
catv
chattr
chgrp
chmod
chown
chroot
clear
cmp
comm
cp
cpio
crond
crontab
cut
date
dc
dd
depmod
devmem
df
diff
dirname
dmesg
dnsd
dos2unix
du
echo
ed
egrep
env
expand
expr
false
fbsplash
fdisk
fgrep
find
flash_lock
flash_unlock
flashcp
flock
fold
free
freeramdisk
fsync
ftpget
ftpput
fuser
getopt
grep
groups
gunzip
gzip
halt
head
hexdump
id
ifconfig
inetd
insmod
install
ionice
iostat
ip
kill
killall
killall5
less
ln
losetup
ls
lsattr
lsmod
lsof
lsusb
lzcat
lzma
lzop
lzopcat
man
md5sum
mesg
mkdir
mkdosfs
mke2fs
mkfifo
mkfs.ext2
mkfs.vfat
mknod
mkswap
mktemp
modinfo
modprobe
more
mount
mountpoint
mpstat
mv
nanddump
nandwrite
nbd-client
nc
netstat
nice
nohup
nslookup
ntpd
od
patch
pgrep
pidof
ping
pipe_progress
pkill
pmap
poweroff
printenv
printf
ps
pstree
pwd
pwdx
rdev
readlink
realpath
reboot
renice
reset
resize
rev
rm
rmdir
rmmod
route
run-parts
rx
sed
seq
setconsole
setserial
setsid
sh
sha1sum
sha256sum
sha512sum
sleep
sort
split
stat
strings
stty
sum
swapoff
swapon
sync
sysctl
tac
tail
tar
taskset
tee
telnet
telnetd
test
tftp
tftpd
time
timeout
top
touch
tr
traceroute
true
ttysize
tune2fs
umount
uname
uncompress
unexpand
uniq
unix2dos
unlzma
unlzop
unxz
unzip
uptime
usleep
uudecode
uuencode
vi
watch
wc
wget
which
whoami
xargs
xz
xzcat
yes
zcat

This was quite confusing - it seems I don't have su in my busybox.

I'm running Baseband 83 at the moment, but will probably move to 85 soon (when my rom upgrades).