[G1 Q&A, Help & Troubleshooting] bobo122:
i think its root-related issue.. i rooted using "universal androot"

after some googling i found that i can check if i'm rooted or not but downloading teminal emulator and typing "su" , first time i tried it i got permission denied (that tells its not rooted) , then i rooted again , and tried "su" again but this time i got "segmentation fault" and then i tried flashing again but got the same error

here is the content of the log file

Go for root !
Version: Universal Androot - v1.6.2 beta 5
Detected OS version:4
ls -l /system/etc
-r-xr-x--- root shell 1176 2009-10-04 18:15 init.goldfish.sh
-r--r----- bluetooth bluetooth 935 2009-06-01 13:48 dbus.conf
-rw-r--r-- root root 183 2008-08-01 15:00 pvasflocal.cfg
-rw-r--r-- root root 7276 2009-10-04 18:15 event-log-tags
drwxr-xr-x root root 2008-08-01 15:00 ppp
-r--r--r-- radio audio 44542 2009-06-01 13:48 AudioPara4.csv
-rw-r--r-- root root 2037 2009-10-04 18:15 bookmarks.xml
-r-xr--r-- root root 415 2008-08-01 15:00 install-recovery.sh
-rw-r--r-- root root 6521 2009-10-04 18:15 apns-conf.xml
drwxr-xr-x root root 2008-11-01 04:03 wifi
drwxr-xr-x root root 2008-11-01 04:03 location
-rw-r--r-- root root 1898 2008-11-01 04:03 AudioFilter.csv
drwxr-xr-x root root 2008-11-01 04:03 dhcpcd
drwxr-xr-x root root 2008-11-01 04:03 firmware
-rw-r--r-- root root 25 2008-11-01 04:03 hosts
-rw-r--r-- root root 85 2008-08-01 15:00 01_qcomm_omx.cfg
drwxr-xr-x root root 2010-01-28 17:36 security
-rw-r--r-- root root 60559 2010-01-28 17:36 NOTICE.html.gz
-rw-r--r-- root root 368 2008-08-01 15:00 vold.conf
-rw-r--r-- root root 5220 2008-08-01 15:00 AudioPreProcess.csv
drwxr-xr-x root root 2008-08-01 15:00 permissions
-rw-r--r-- root root 1321 2008-08-01 15:00 contributors.html
-rw-r--r-- root root 682 2008-08-01 15:00 contributors.css
drwxr-xr-x root root 2008-08-01 15:00 bluez
-rw-r--r-- root root 232 2009-06-01 13:48 gps.conf
-rw-r--r-- root root 473 2008-08-01 15:00 pvplayer.cfg
ls -l /system/bin/reboot
lrwxrwxrwx root root 2009-06-01 13:49 reboot -> toolbox
cat /proc/sys/kernel/osrelease
2.6.29-00479-g3c7df37
getprop ro.product.model
T-Mobile G1
getprop ro.product.brand
tmobile
getprop ro.product.name
kila
getprop ro.product.manufacturer
HTC
getprop ro.build.product
dream
ls -l /sqlite_stmt_journals
-rws--x--x root root 16224 2011-06-18 05:19 rootshell
ls -l /data/local/tmp
opendir failed, Permission denied
ls -l /app-cache
/app-cache: No such file or directory
run mount
rootfs / rootfs ro 0 0
tmpfs /dev tmpfs rw,mode=755 0 0
devpts /dev/pts devpts rw,mode=600 0 0
proc /proc proc rw 0 0
sysfs /sys sysfs rw 0 0
tmpfs /sqlite_stmt_journals tmpfs rw,size=4096k 0 0
none /dev/cpuctl cgroup rw,cpu 0 0
/dev/block/mtdblock3 /system yaffs2 ro 0 0
/dev/block/mtdblock5 /data yaffs2 rw,nosuid,nodev 0 0
/dev/block/mtdblock4 /cache yaffs2 rw,nosuid,nodev 0 0
/dev/block//vold/179:1 /sdcard vfat rw,dirsync,nosuid,nodev,noexec,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8 0 0
run df
/dev: 49192K total, 0K used, 49192K available (block size 4096)
/sqlite_stmt_journals: 4096K total, 16K used, 4080K available (block size 4096)
/system: 69120K total, 68940K used, 180K available (block size 4096)
/data: 76544K total, 58920K used, 17624K available (block size 4096)
/cache: 69120K total, 28952K used, 40168K available (block size 4096)
/sdcard: 991488K total, 956912K used, 34576K available (block size 16384)
Preparing Exploit ... :true
Preparing busybox binary ... :true
User selected: Cupcake
Preparing Su binary ... :true
Preparing Superuser apk ... :true, resid:2131034117
Preparing root toolkit script ... :true
Trying to get mount point:/data
/dev/block/mtdblock5 /data yaffs2 rw,nosuid,nodev 0 0
Trying to get mount point:/system
/dev/block/mtdblock3 /system yaffs2 ro 0 0
mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
mkdir /system/xbin
cat su > /system/xbin/su
chmod 04755 /system/xbin/su
ln -s /system/xbin/su /system/bin/su

mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system
mount -o remount,rw,nosuid,nodev -t yaffs2 /dev/block/mtdblock5 /data

mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
rm /system/bin/su
rm /system/xbin/su

Preparing to execute exploit, do chmod
Executing exploit..
cmd: /data/data/com.corner23.android.universalandroot/files/getroot /dev/block/mtdblock5 yaffs2
[*] Android local root exploid (C) The Android Exploid Crew
[*] Modified by shakalaca for various devices
[+] Using basedir=/sqlite_stmt_journals, path=/data/data/com.corner23.android.universalandroot/files/getroot
[+] opening NETLINK_KOBJECT_UEVENT socket
[+] sending add message ...
[*] Try to invoke hotplug now, clicking at the wireless
[*] settings, plugin USB key etc.
[*] You succeeded if you find /system/bin/rootshell.
[*] GUI might hang/restart meanwhile so be patient.
Wifi enabled ...
mkdir failed for /system/xbin, File exists
rm failed for /system/app/Superuser.apk, No such file or directory
write: No space left on device
rm failed for /data/local/tmp/rootshell, No such file or directory
Exploit delete success
Install/Uninstall rootkit: true
ls -l /sqlite_stmt_journals
-rws--x--x root root 16224 2011-06-18 05:20 rootshell
ls -l /data/local/tmp
opendir failed, Permission denied
ls -l /app-cache
/app-cache: No such file or directory
run mount
rootfs / rootfs ro 0 0
tmpfs /dev tmpfs rw,mode=755 0 0
devpts /dev/pts devpts rw,mode=600 0 0
proc /proc proc rw 0 0
sysfs /sys sysfs rw 0 0
tmpfs /sqlite_stmt_journals tmpfs rw,size=4096k 0 0
none /dev/cpuctl cgroup rw,cpu 0 0
/dev/block/mtdblock3 /system yaffs2 ro 0 0
/dev/block/mtdblock5 /data yaffs2 rw,nosuid,nodev 0 0
/dev/block/mtdblock4 /cache yaffs2 rw,nosuid,nodev 0 0
/dev/block//vold/179:1 /sdcard vfat rw,dirsync,nosuid,nodev,noexec,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8 0 0
run df
/dev: 49192K total, 0K used, 49192K available (block size 4096)
/sqlite_stmt_journals: 4096K total, 16K used, 4080K available (block size 4096)
/system: 69120K total, 69084K used, 36K available (block size 4096)
/data: 76544K total, 58912K used, 17632K available (block size 4096)
/cache: 69120K total, 28952K used, 40168K available (block size 4096)
/sdcard: 991488K total, 956912K used, 34576K available (block size 16384)