I can confirm on Dell Studio 1555 BIOS A08 Ubuntu 10.04 Linux 2.6.32-22-generic x86_64 ATI Mobility Radeon HD 4570 fglrx
This behavior began after kernel update. With previous kernel (2.6.32-21), system would not suspend and only locked-screen as described in this bug: https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/573938.
Suspend and resume worked in Karmic.
I can confirm on Dell Studio 1555
BIOS A08
Ubuntu 10.04
Linux 2.6.32-22-generic x86_64
ATI Mobility Radeon HD 4570
fglrx
This behavior began after kernel update. With previous kernel (2.6.32-21), system would not suspend and only locked-screen as described in this bug: https:/ /bugs.launchpad .net/ubuntu/ +source/ pm-utils/ +bug/573938.
Suspend and resume worked in Karmic.