I've got the same problem but in my case it was permanent. The fixed I used was too launch windows manager from startup Fully up to date patched Ubuntu 10.4 latest kernel installed. Dell laptop 1545 specs as follows
Intel® Pentium® Dual Core™ T4400 (2.2GHz/800Mhz FSB/1MB cache) Genuine Windows® 7 Home Premium, 64bit, English Well no dual boots Ubuntu Glossy, widescreen 15.6 inch display (1366x768) 8X CD/DVD Burner (Dual Layer DVD+/-R Drive) 4GB Shared Dual Channel DDR2 at 800MHz 250GB SATA Hard Drive (5400RPM) Intel Graphics Media Accelerator X4500HD Dell 1397 Wireless-G I think the problem may have started after the last two kernels. -- No window decorations on login in Lucid https://bugs.launchpad.net/bugs/579709 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
