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[Bug 348694] Re: Jaunty will not boot on Dell Optiplex 760 unless hpet=disable


The bug task for the somerville project has been removed by an automated
script.  This bug has been cloned on that project and is available here:

** No longer affects: somerville

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  Jaunty will not boot on Dell Optiplex 760 unless hpet=disable

Status in “linux” package in Ubuntu:

Bug description:
  MIT is switching its standard recommended desktop configuration from the Dell Optiplex 755 which has
  reached end of life to the new Dell Optiplex 760.

  Unfortunately there seems to be a nasty kernel bug around HPET.

  Repeat by:

  Boot today's Jaunty Live CD.  (I used 3/24/09 and also as another test 1/13/09)
  Select your language
  Choose "Try Ubuntu..."

  Actual results:

  Blank screen

  Expected results:

  Working Jaunty.


  Select option ACPI=off


  We know from other bug reports for example, 
  that there is a problem with HPET.  That debian bug requests incorporation of a one-line kernel change
  that changes an oops message from displaying on every clock tick to one that only appears once.

  It does not, however get HPET working.

  This problem manifests under Intrepid with much spewage of kernel oops messages and/or terribly slow operation.
  Again the work-around of of turning off ACPI seems to help.

  The hardware has ICH10 motherboard chips.  How new are they?

  Also I see a report that the PNP-BIOS is not working, but I do not
  know if this is relevant.

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