Hi Petar,
Thanks for letting us know, and sorry it wasn't possible to get back to
this bug.
I'll mark it as Invalid as the root cause isn't know; but glad it's
working now.
** Changed in: linux (Ubuntu)
Status: Confirmed => Invalid
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kernel 5.4.0-58 WORKS without any changes! Good work! THANKS!
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Title:
Computer freezes on kernel 5, works on kernel 4
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Hi Petar,
I just asked for a double-check of -26 and -28 as you've done.
Thanks, and sorry if that wasn't clear.
The difference in the source code is just for reference purposes,
you don't have to act on it -- the available packages/builds are
already with (-28) and without (-26) it.
Your test d
Hi Mauricio,
I don't understand what you are asking me to do...
You are showing me a small difference in the source code, but I am testing
binaries. And between them is the whole complicated build process.
Since I kept the kernels 5.4.0-26 & 5.4.0-28 I re-tested again.
5.4.0-26 boots with and
Hi Petar,
Thanks for the bisection, but it seems something is a bit off.
The only change between 5.4.0-26 and -28 is a patch for s390x,
which is a different architecture, nothing to do with amd64,
and no common files are changed.
Could you please review the dis_ucode_ldr parameter is what
you ex
5.4.0-28 BAD
which leaves the last good
5.4.0-26 GOOD
5.4.0-27 is missing
QED
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Title:
Computer freezes on kernel 5, works on kernel 4
To manage
Sure, that would work more efficiently.
The URLs change for every new version/package build.
You can get get to the .deb files this way:
1) Go to https://launchpad.net/ubuntu/focal/+source/linux
2) Click on the version under 'Releases in Ubuntu'
(some versions are listed multiple times, but poin
well
5.4.0-37 bad
The recipe from above does not work for 5.4.0-31*
I will do a binary search without too much "ping - pong" if you tell me the
names of the kernels and how to get them...
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Petar, thanks.
Good news that a previous 5.4 kernel works; it makes the search smaller.
- 5.4.0-26 good
- 5.4.0-48 bad
Let's try 5.4.0-37.
Could you please download its .deb files, install with 'dpkg -i *.deb',
and test it without dis_ucode_ldr?
This list includes linux-modules-extra and heade
5.4.0-26 kernel boots without dis_ucode_ldr
5.3.0-67 kernel ditto
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Title:
Computer freezes on kernel 5, works on kernel 4
To manage notification
Hi Petar,
Thanks for providing the files.
The original issue, boot failure, seems to be a conflict between the 5.4
kernel and the intel-microcode blob, since the same blob works fine in
the 4.15 kernel.
(For the printout alignment issue, let's track that on another bug
report.)
Let's try to bis
Details:
4.15 kernel:
[0.00] kernel: microcode: microcode updated early to revision
0xdc, date = 2020-04-27
[0.00] kernel: Linux version 4.15.0-112-generic
(buildd@lcy01-amd64-027)
[0.00] kernel: Command line:
BOOT_IMAGE=/boot/vmlinuz-4.15.0
1. kernel 5.4.0-48 -"quiet" -"splash" +"dis_ucode_ldr"
cat /proc/cpuinfo > cpuinfo-5.4.0-48.txt
dpkg -s intel-microcode | grep Version > intel-microcode-5.4.0-48.txt
2. kernel 4.15.0-112 -"quiet" -"splash" -"dis_ucode_ldr"
cat /proc/cpuinfo > cpuinfo-4.15.0-112.txt
dpkg -s intel-microcode | grep
Interesting.
For that you can add 'dis_ucode_ldr' in GRUB_CMDLINE_LINUX_DEFAULT in
/etc/default/grub.
Then run 'sudo update-grub', and confirm the change with 'grep dis_ucode_ldr
/boot/grub/grub.cfg'.
You should see non-recovery lines w/ that option as well.
Could you please upload /proc/cpuinf
Good catch Mauricio!
1. "nomodeset" did not help.
2. "dis_ucode_ldr" succeed.
The logs after the successful boot are attached.
What can I do to make the boot use "dis_ucode_ldr" by default?
** Attachment added: "var_log3.tar.gz"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1895458/+a
Ok, so nothing yet on the screen seems to suggest either
a graphics-related issue or a different, early problem.
The successful test to boot into recovery mode provides
a very good lead; thanks for coming up with that.
These are the 3 kernel options added by the recovery mode,
per the kern.log fi
Removing 'quiet splash' and adding 'earlyprintk=vga ignore_loglevel'
changed nothing - no more info on the screen.
Than I rebooted kernel 5.4.0-48 in recovery mode (Your system is
currently running without video hardware acceleration) and I am
attaching the var_log2.tar.gz
** Attachment added: "v
Thanks.
Ok, so there's nothing printed to console after grub loads the kernel
and initramfs.
The parameters in your grub config look good (kernel+initramfs+cmdline
w/ root= and ro.)
Could you please try without 'quiet splash' again, but add the options:
'earlyprintk=vga ignore_loglevel' ?
That
Please find attached a snapshot of the boot screen
(var_log.tar.gz::var_log/1.jpg) and the screen after Ctrl+x
(var_log.tar.gz::var_log/2.jpg) - it simply freezes and displays nothing
more.
What I did:
1. booted kernel 5.4.0-48 without "quiet" & "splash" - 1.jpg
2. Ctrl+x - the computer totally fr
Hi Petar,
Thanks for the bug report.
Unfortunately there's little details about the error.
Could you please post a picture of your compute screen
once the 5.4 kernel fails to boot?
(after you removed the 'quiet' and 'splash' options in
the grub editor, and pressed ctrl-x to boot.)
Mainly looki
I am not able to run "apport-collect 1895458" because the computer
freezes
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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