As reported by Scott Moser on comment #142, I hereby confirm that the suspend issue (endless flashing moon requiring a hard power off) no longer appears on my T400 (with Intel graphics) since I have upgraded to Kubuntu Natty 11.04, and this without any workaround. My laptop now goes correctly to standby mode (I tested a few tens times over two weeks now without any one failure).
As reported by Scott Moser on comment #142, I hereby confirm that the suspend issue (endless flashing moon requiring a hard power off) no longer appears on my T400 (with Intel graphics) since I have upgraded to Kubuntu Natty 11.04, and this without any workaround. My laptop now goes correctly to standby mode (I tested a few tens times over two weeks now without any one failure).