Red Hat Bugzilla – Bug 34747
Thinkpad T20/T21 refuses to wake from sleep
Last modified: 2007-04-18 12:32:32 EDT
IBM ThinkPad T20/T21 with fresh laptop install of 7.1 RC2 qa0401. With the
power unplugged pressing fn+f4 puts the system into sleep state (Screen
blanks, system beeps various times, wireless nic shuts off, sleep LED comes
Leave it alone for a while (5min to an hour or even more) and try to wake
the system by pressing fn or any other key. system refuses to wake. At this
point you need to hold the power button down for more than 5secons to force
Because the NIC goes to sleep and doesn't wake with the system I cannot
telnet/ssh in to verify the system is really alive.
This is a BIOS problem. Neither Linux nor any other OS can do anything while
the machine is in sleep mode.
(Doing just the same thing works perfectly on other hardware; I'm using a
Gericom 3xC and a Fujitsu LifeBook C, I've also tried to reproduce this on
various other machines without success.)