Luis: It was under Intrepid that I first noticed clock problems myself.
In fact, the Intrepid LiveCD has an old enough version of the kernel that you may see what I call, "Infinite spew," where the HPET code prints a kernel oops on every clock tick. I read a lot of deltas on kernel.org dealing with HPET issues. Apparently it's very tricky to get everyting right for HPET. The current Intrepid kernel lacks several cleanups of HPET, and so its operation is erratic. Jaunty contains the cleanest HPET code available, and this enabled us to understand the root cause of the HPET problems for the Dell 760: Mis-directed clock interrupts when in the C3 energy saving CPU state. I would say that reliable HPET operation with C States emabled is not possible with the Intrepid kernel. Worse, there is HPET code that gets used even if you disable HPET. For Intrepid, go into the bios and disable C States. For Jaunty, the best work around is to set the boot option: 'acpi_skip_timer_override' -- Jaunty will not boot on Dell Optiplex 760 unless hpet=disable https://bugs.launchpad.net/bugs/348694 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
