Bios Upgrade partially done

[Rio Severo]

I have tried to upgrade the BIOS of a Dell XPS M13330 notebook from the
version A010 (now I am not sure that it was A010) to  version A015.
I have used the file "system-bios-xps-m1330_0.a15-1_all.deb" with Ubuntu
Linux 9.04. The first time there was something wrong but the second it
was OK. The issue is that the version on display at startup (and in
setup) is always A010 also reinstalling. The update program detects A015
and so I think that the BIOS version on the flash is really A015 and not
A010 as is displayed at startup.
There is something that I can do for updating the displayed version?
Thanks in advance
Sergio