I have the same problem with Ubuntu 11.04:
Environment: ASUS M4A88TD-V EVO/USB3 Linux server 2.6.38-11-generic #50-Ubuntu SMP Mon Sep 12 21:17:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux AMD Athlon(tm) II X2 220 Processor
I have the same problem with Ubuntu 11.04:
Environment:
ASUS M4A88TD-V EVO/USB3
Linux server 2.6.38-11-generic #50-Ubuntu SMP Mon Sep 12 21:17:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
AMD Athlon(tm) II X2 220 Processor