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a potpourri of mirth and madness

Adventures in rebooting

Rebooting can be an exciting experience when tracking the bleeding edge of Ubuntu development.  Today, after installing the latest round of updates (including a new kernel, the latest grub 2, and all sorts of other important things, I rebooted.  A few things happened:

  • My system failed to boot at first, because grub.cfg had been updated to use search --no-floppy, which wasn’t supported by the version of GRUB actually living in my MBR. I think it might be nicer if something as critical as a boot loader were more forgiving about this sort of thing, but at least GRUB’s interactive editor makes this easy to work around at boot time. A grub-install /dev/sda from single-user mode should fix it permanently.
  • I noticed the console being set to graphics mode very early, signaling the arrival of kernel mode setting.  When the X server started up, it did so without any flickering, creating a smooth transition from startup into the login screen.
  • Presumably due to the above, my displays started to behave differently, with the external LCD set to its native mode (1920×1200) and the internal one set to its native mode (1680×1050), with the latter displaying an offset picture (much of the login screen was “off the edge” of the display)

I was hoping to see the lightning-fast resume times I’d observed in some KMS demos, but it still takes a few seconds on my system.  At least it still works, with all this change.  Onward and upward!

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Written by Matt Zimmerman

June 24, 2009 at 00:18

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4 Responses

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  1. […] latest karmic upgrades brought me temporary GRUB borkage and kernel mode setting:https://mdzlog.alcor.net/2009/06/24/adventures-in-rebooting/ […]

  2. Re: Resume times

    For me, KMS gets resume time back down to what it was on Hardy, 2 o 3 seconds. On Jaunty it was 10 seconds.

    Mackenzie

    June 30, 2009 at 15:01

    • For me, it’s about the same on Jaunty and Karmic. I’ve seen demos where it’s under 1 second with KMS, though, and am interested to know what’s different about my setup

      mdz

      June 30, 2009 at 15:29

      • Actually, after trying again, it does appear to have sped up. I don’t get the “there when you open lid” thing though because my laptop requires that I hit the spacebar in order to resume.

        Mackenzie

        July 4, 2009 at 23:39


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