On Saturday 15 May 2010 12:55, Karanbir Singh wrote: > On 05/15/2010 12:27 PM, Colin Coles wrote: > > I have updated 8 machines so far and 2 are refusing to boot on > > 2.6.18-194.3.1.el5 kernel, they just hang at: 'Starting udev:' but when I > > revert to 2.6.18-164.15.1.el5 kernel they boot fine. Any pointers? > > Do you have anything non-standard on the machines ? Start by looking at > the h/w specs and setup. Thanks Karanbir, Very generic, basic off the shelf workstation stuff, both have been running CentOS for over a year without problems and other machines that are OK have very similar specs all are AMD 64: AMD Athlon(tm) 64 X2 Dual Core Processor 6400+ 4Gb ram AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ 2 Gb ram This is very repeatable and nothing seems to be written to /var/log/messages during failed boots, is this normal? Cheers, Colin.