OK then I understood the room I had to get was in my /boot partition.
Therefore, I used Gparted live CD to expand it.
At first a documentation about ubuntu was saying to make a /boot partition of 32 MB using ext3. I have expanded it to 130 MB and that's OK now.
I will do the same on my wife's laptop.
I just would like to add that having met that error in the past under Hardy, I was unable to find out a solution or even a cause (lack of room on /boot) on ubuntu forums. Of course some said I was lacking space. But nowhere I was able to find out that capital information : lack of room on /boot.
OK then I understood the room I had to get was in my /boot partition.
Therefore, I used Gparted live CD to expand it.
At first a documentation about ubuntu was saying to make a /boot partition of 32 MB using ext3. I have expanded it to 130 MB and that's OK now.
I will do the same on my wife's laptop.
I just would like to add that having met that error in the past under Hardy, I was unable to find out a solution or even a cause (lack of room on /boot) on ubuntu forums. Of course some said I was lacking space. But nowhere I was able to find out that capital information : lack of room on /boot.
I just hope it will be usefull to someone.
Thanks a lot for your help
Kind regards