I tried to install the new kernel but software-center's progress bar stopped at about 95% and remained there for about 15 minutes, after which I closed it. It had not frozen, it reacted to closing and displayed the rotating progress arrows.
Today 3.5.0-20 effectively booted; I started the system and when I came back after dinner (~30 min) I was able to log on. I found that sound did not work but could run programs and download the proposed kernel (which did not complete installation).
When I shut down the system (to see if I still had a bootable state) I got the shut-down screen (blinking dots) for several minutes; I hit ESC and saw that the last message was "saving system clock to hardware clockhutting...". Probably a message written on top of another. As nothing seemed to change I switched off the computer and booted 3.5.0-19.
I tried to install the new kernel but software-center's progress bar stopped at about 95% and remained there for about 15 minutes, after which I closed it. It had not frozen, it reacted to closing and displayed the rotating progress arrows.
Today 3.5.0-20 effectively booted; I started the system and when I came back after dinner (~30 min) I was able to log on. I found that sound did not work but could run programs and download the proposed kernel (which did not complete installation).
When I shut down the system (to see if I still had a bootable state) I got the shut-down screen (blinking dots) for several minutes; I hit ESC and saw that the last message was "saving system clock to hardware clockhutting...". Probably a message written on top of another. As nothing seemed to change I switched off the computer and booted 3.5.0-19.