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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:http://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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