freshly flashed installed kp 53 then thumb no issues
installed qt mobile hotspot vkb wont pop up uninstall and reboot then everything fine so what can be wrong ?

Problem solved.
Hi Shubell, you were right. It was a frequencies annoyance. After installing Thumb, system was booting trying to overclock at 850, as it couldn't phone was rebooted and loaded default frequencies limits 125 600. As 125 was avoided there was no way being stable.

As I prefer using undervolting for battery saving I use this settings:
and works OK:

sudo gainroot
kernel-config show
kernel-config load xlv
kernel-config limits 250 805
kernel-config save myprofile1
kernel-config default myprofile1

Thanks Shubell

I have run into an issue which I believe may be a result of the packaging of the thumb compiler.

The only mention I can find of the path /usr/src/toolchain_build/output/... within the build environment is within the generated .libs/liblove.la where it lists both the missing file mentioned in the middle of the listed libraries along with what appears to be the correct path as the last entry in the list.

Digging into it a bit, the *.la files listed within the toolchain all have a libdir= entry pointing to this non-existant folder.

Bug report for a similar issue in Ubuntu
https://bugs.launchpad.net/linaro-to...es/+bug/916671
Related patch:
http://bazaar.launchpad.net/~linaro-.../revision/2317

I'm not on the laptop with the build at the moment so I'm having to write from memory.

@Android_808: does it try to do a static link of libstdc++? could you share the sources so I can verify what happens in my SDK?

@freemangordon: I'll try to stick them on dropbox later tonight/tomorrow and PM you the link.

Strange but my n900 won't boot after install thumb2,this happend to me for the first time,any suggestions?
regards
note:before i install the thumb2,i had already installed u-boot+backupmenu and kernel-power53,nothing more

No idea. Never happened to me. FS corruption? If I understand you correctly and this is a new installation, then you won't lose anything by flashing and starting again.

If I want to flash both rootfs and emmc on a Thumb2-patched device (to restore it to factory condition), should I flash vannila then combined or combined then vanilla then combined again?

procedure for flashing is:

*) if you have working rootfs (= you can boot device normally):
1) flash eMMC
2) flash combined

*) if you do *not* have working rootfs:
1) flash combined
2) flash eMMC
3) flash combined (again)

Never boot system between flashing steps! Otherwise you need to start flashing again.

Thanks Pichlo for your advice and sorry for my late reply,but till now i can't boot my n900 after installing thumb2,i trying with:
flashing under linux first emmc,second combined
then i chech for errors:
umount /dev/mmcblk0p1
mkfs.vfat -F32 /dev/mmcblk0p1
fsck -af /dev/mmcblk0p1
fsck -r /dev/mmcblk0p1
mount /dev/mmcblk0p1 /home/user/MyDocs
restart
No any errors,then i try(i don't know how many times) to install thumb2,
everything looks good but when restart my n900 i had only black screen,nothing more,it does not matter how i trying to flashing my n900(for example recommended from Pali from the last post on this thread)i can't boot after install thumb2