1. Please describe the problem:
Boot hangs after Grub2 kernel is selected printing only one line "Probing EDD ... ok".
2. What is the Version-Release number of the kernel:
3. Did it work previously in Fedora? If so, what kernel version did the issue
*first* appear? Old kernels are available for download at
Works in 4.19.10. Appears in 4.19.13.
4. Can you reproduce this issue? If so, please provide the steps to reproduce
the issue below:
Happens every time I boot 4.19.13.
5. Does this problem occur with the latest Rawhide kernel? To install the
Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
``sudo dnf update --enablerepo=rawhide kernel``:
6. Are you running any modules that not shipped with directly Fedora's kernel?:
broadcom wireless, and virtualbox drivers, but that should be much later in boot.
7. Please attach the kernel logs. You can get the complete kernel log
for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
issue occurred on a previous boot, use the journalctl ``-b`` flag.
Can you test kernels 4.19.11 and 4.19.12 as well? Knowing the exact version makes finding the regression much easier. Also it would be best to reproduce it without out of tree modules.
There are some tips for debugging boot problems here: https://docs.fedoraproject.org/en-US/quick-docs/kernel/troubleshooting/index.html#_boot_failures. It sounds like you've already removed quiet and rhgb, but adding initcall_debug to the kernel command line might also provide some insight.
Finally, what kind of hardware is this?
4.19.11 & 4.19.12 work ok. With initcall_debug and earlyprintk=vga I can see output, but it scrolls by too quickly. boot_delay seems to hang the output after the first few iterations. The last thing I see on the screen is something like "kernel panic", attempting to kill idle thread. Will try to get more of the output somehow.
This is a Dell Precision t5500 with dual x5690 cpus.
Created attachment 1521369 [details]
video of kernel panic
video of kernel panic
Created attachment 1521370 [details]
video of kernel panic
Blacklisted kernel modules "wl" and "vboxdrv,vboxnetflt,vboxnetadp", but the kernel still crashes. I see the modules are not loaded if I boot into 4.9.10, so the blacklisting works.
One non-typical piece in my setup is that my root filesystem is an lvm2 cache filesystem, so I have two extra modules added to /etc/dracut.conf.d/lvm2.conf:
add_drivers+=" dm-cache dm-cache-smq"
Didn't cause problems before.
I have this issue on a similar dual socket system.
It started after 4.19.13 and continues on 4.20.3 currently in testing.
boot_delay did not work for me, but I recorded in slow motion the earlyprintk=vga output.
The relevant part was:
kernel bug at mm/page_alloc.c=790
the reset was too blurry to make out clearly.
There were only two commits in 4.19.13 that changes mm/page_alloc.c
I think the latter one is the cause, but I haven't had the time to make a test build with it reverted.
It's the first commit above that is causing the problem, not the second. I removed the first one, and the patched kernel comes up ok.
(In reply to robert.shteynfeld from comment #7)
> It's the first commit above that is causing the problem, not the second. I
> removed the first one, and the patched kernel comes up ok.
That is good detective work, can you please report this upstream by sending an email to the addresses mentioned in the commit, with firstname.lastname@example.org in the Cc?
I can successfully boot using 4.20.6 available from testing on F29.
Thanks Robert for compiling and going through the emails to get that reverted.
Thanks for your help tad. kernel.org helps those who help themselves.
*** Bug 1669846 has been marked as a duplicate of this bug. ***
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