On Fri, 2012-11-02 at 02:53 +0400, jaakov jaakov wrote:
[...]
> Alas, "boot_delay=1000" does not slow down printing.
Sorry, I misunderstood where things were going wrong. Apparently the
kernel itself is booting just fine, but things go wrong later in the
boot sequence.
> It just introduces a pause right after blanking the screen at boot,
> but before quickly printing pages of information.
> Thus, to get usable screenshots from a failing boot, I have to do some
> preparation.
> I have two kernels installed, one from testing
> (linux-image-3.2.0-3-amd64, version 3.2.23-1), and the other from
> unstable (linux-image-3.2.0-4-amd64, version 3.2.32-1).
> Both can be run with or without "acpi=off", with or without "quiet",
> with or without "elevator=noop" (currently used, since an SSD is
> inside), with or without "boot_delay=1000", normally or in a repair
> mode.
>
> E. g., attached is a screenshot of a boot of kernel 3.2.0-4, with
> "acpi=off quiet elevator=noop".
> The machine in the state you see does not boot further but remains
> responsive to Ctrl+Alt+Del, which performs a reboot.
[...]
For further testing, please do not use acpi=off. We need to make the
normal configuration work, and acpi=off may introduce new and different
problems!
The interesting thing I see there is the last boot progress message,
which is 'Enabling power management...' Is this always the last line of
boot progress?
If so, please can you edit /etc/init.d/acpi-support, changing the first
line from:
#!/bin/sh
to:
#!/bin/sh -x
This should make it show the progress of this step in detail. Then take
a new screenshot when the boot process hangs again.
Also, when the boot process is hung, please do this:
1. Hold down Alt.
2. Press PrtSc and then W. This should produce the message 'SysRq :
Show Blocked State'.
3. Release Alt.
Assuming that the system log is still working at this point, on the next
successful boot you should find some debugging information in
/var/log/messages starting with the line 'SysRq : Show Blocked State'.
Please send that information.
Ben.
--
Ben Hutchings
I'm always amazed by the number of people who take up solipsism because
they heard someone else explain it. - E*Borg on alt.fan.pratchett
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