very strange X11 behaviour during upgrade

Pierre Frenkiel frenkiel at
Mon May 19 16:07:17 UTC 2008

I had a very strange X11 problem during the upgrade from gutsy to hardy with
the 1st step (downloading packages) was normal,(it took about 40 minutes
for 1.6 Gb). Then, it started installing the packages, with an
estimated remaining time of 2 hours. After about 15 minutes, it became
almost frozen:
   - the setting for every package took 2 to 5 minutes
   - in another xterm window, if I hit <CR>, the line feed came 30
     seconds later, but if I moved the mouse, the line feed came immediatly !!!
   - it's not a problem of machine load, because if I made an ssh connection
     from an other machine, the response was immediate.

  this lasted 12 hours (twelve), and about 15 minutes before the end, the
  speed became suddenly perfectly normal.

  Has anybody a possible explanation?


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