Inspired by the timer discussion, I revisited hpet. I tried hpet=force and clocksource=hpet. Both failed. So I tried nohpet again. This gives about a 30 second boot. Not as fast as when bootchart is installed, but not bad. If one puts nohpet in /etc/default/grub in line GRUB_CMDLINE_LINUX="nohpet" and then run update-grub and reboot, the parameter is persistently used for each boot. I then tried hibernate and resume from hibernate. This also works well, and resume from hibernate takes less than 15 seconds (just like with bootchart installed).
So this is also a way to cure the slow boot problem. I am not sure what it does to the highres timers. I assume that the system is still running tickless in highres. Not sure how to check that. Pulse audio seems to be working OK which makes me think that the system is running in highres. It does not cure the poor disk performance. hdparm -t /dev/sda5 still gives me only about 50 MB/sec. This increases to about 70 MB/sec if one launches a program that saturates one of the CPUs (like an infinite loop). So there is still a problem. After resume from hibernate, X still crashes randomly which is annoying. I have been meaning to look into that as well. X does not crash randomly after a normal boot. -- Disk driver problems on Toshiba NB305Netbook https://bugs.launchpad.net/bugs/601986 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
