** Changed in: linux (Ubuntu Hardy)
Status: Incomplete = New
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kernel oops during bootup in LTSP
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I made a test using the following mailine kernel:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.33/linux-
image-2.6.33-020633-generic_2.6.33-020633_i386.deb
It still doesn't boot.
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kernel oops during bootup in LTSP
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** Tags added: hardy
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Ok. The piece you are commenting out there includes the kbd controller
frobbing. That has been fixed up a lot in karmic kernels specifically
to handle the case where it is missing. It also fixes another enable
method, so it might be worth trying the latest karmic kernel to see if
the code there
I'm sorry, but why is this bug still marked as incomplete? Additional
data we provided has narrowed down the cause of the regression. What
else is missing?
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(11.56.35) Mart Raudsepp: I've found two problems
(11.56.42) Mart Raudsepp: the first problem is in not being able to copy the
kernel commandline to high memory
(11.57.00) Mart Raudsepp: so kernel launches without parameters
(11.57.07) Mart Raudsepp: that complicated debugging a bit too
Someone pointed out today on IRC that:
(16.21.03) wwx: Looks like it might be an A20 issue.
(16.21.36) wwx: In the transition from 2.6.22 to 2.6.23, A20 handling was
rewritten.
(16.24.15) wwx: arch/i386/boot/a20.c appeared in 2.6.23 kernel. Previously this
part written in ASM and found
(16.27.24) wwx: When you comment out some initialization parts in a20.c, then
2.6.23 boots.
(16.27.58) wwx: In later kernels, a20.c changed some more, so simply commenting
out some lines won't help anymore.
(16.30.02) wwx: Look at the a20.c file, in function int enable_a20(void).
int
(16.36.32) wwx: in 2.6.22 kernels, this part is written in asm.
(16.37.00) wwx: from changelog: A20 handling code for the new x86 setup code.
This implements the same algorithms as the assembly version
(16.38.52) wwx: before 2.6.23 same A20 line enable code (in assembler) is in
@Martin-Eric -- sound most excellent. If you are not able to get bisect
results, testing the mainline builds as above may also help narrow this
down.
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Btw, it seems that I found someone familiar with GIT bisecting to take
over investigation of this issue. Please stay tuned.
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** Changed in: linux (Ubuntu Hardy)
Importance: Undecided = High
Assignee: (unassigned) = Andy Whitcroft (apw)
Status: New = In Progress
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@Martin-Eric -- you had success with a vanilla v2.6.24 kernel, using a
cut-down ubuntu configuration. Now that we have vanilla builds
available for testing we can use those to try and identify the trigger
for this regression.
The first logical test would be to try a v2.6.24 vanilla kernel with a
** Changed in: linux (Ubuntu)
Assignee: (unassigned) = Andy Whitcroft (apw)
** Changed in: linux (Ubuntu)
Status: Triaged = In Progress
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kernel oops during bootup in LTSP
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** Changed in: linux (Ubuntu)
Importance: Undecided = High
Assignee: (unassigned) = Ubuntu Kernel Team (ubuntu-kernel-team)
Status: New = Triaged
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I started with config-2.6.24-19-generic and removed support for non-
Geode platforms.
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And to answer the question, no, linux-image-2.6.27-2-generic did not
restore operation on this Geode SC2200. Again, the last known good
kernel with this chipset is the 2.6.22 from Gutsy.
** Tags added: linux-2.6.27
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kernel oops during bootup in LTSP
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** Tags added: regression-release
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Hi Martin-Eric,
Thanks for testing 2.6.27. Since we just rebased with the upstream
kernel I suspect this is likely an issue which exists upstream as well.
I'd like to try and narrow down the patch which is causing this
regression from 2.6.22 to 2.6.24. The only issue is that we don't have
the
Vanilla 2.6.24 (self-made kernel package) works fine, so this would have
to be some Debian or Ubuntu-specific patch.
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** Tags added: linux-2.6.24
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Just to be more explicit, the 2.6.22 kernel that was standard on Gutsy
worked with the same hardware, so this is a regression introduced by
Hardy.
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This is on Hardy/LTS using 2.6.24 and that is the version that is
expected to work for the whole duration of the LTS cycle. Please
investigate that one. Thanks!
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The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the
upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would
appreciate it if you could please test this newer 2.6.27 Ubuntu kernel.
There are one of two ways you should be able to test:
1) If you are comfortable
** Attachment added: Screenshot of kernel oops during bootup.
http://launchpadlibrarian.net/15434295/1.jpg
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[Bug 241307] Re: kernel oops during bootup in LTSP
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