T520 grub issue

[libco]

Hi I changed the size of the default windows partion I’ve installed Ubuntu, so now I’m using Grub2 as default boot manager and on start when I push Thinkvantage button nothing happens it just continues to boot and on the other Thinkpad I have it start that Thinkvantage rescue system so I think something is wrong and other problem I don’t know how to access to bios on the other ThinkPad I have its F2 but here I tried lot of buttons but nothing worked… sorry for the grammar and I hope someone will help me, Thanks!
Libco.

[dr_st]

To access the BIOS press F1.

If you make modifications to the master boot record and the partition table, which you obviously did installing Grub, you often make the Thinkvantage stop working. But just in case - what happens when you press F11 during startup?

[libco]

thx f1 works, when i hit F11 nothing happens

[libco]

Just one more thing ... time to time grub stuck at grub loading. after i reboot from windows and i have to reinstall grub to restore it, i read about this bug in coherence with some hp recovery so here i blame that lenovo rescue and recovery thing if annyone have simmilar issue and fixed it somehow please let me know, thanks. Libco