Bug 2432311

Summary: building a 6-19.rc6 kernel with "-j21" causes system freeze with blinking light on the caps-lock key (no coded blinks)
Product: [Fedora] Fedora Reporter: George R. Goffe <grgoffe>
Component: kernelAssignee: Charles Haithcock <chaithco>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: urgent Docs Contact:
Priority: unspecified    
Version: 44CC: acaringi, adscvr, airlied, chaithco, hans, hpa, jforbes, kernel-maint, linville, masami256, mchehab, nickolasjcarr, ptalbert, steved, suraj.ghimire7
Target Milestone: ---Keywords: Triaged
Target Release: ---Flags: chaithco: needinfo? (grgoffe)
Hardware: x86_64   
OS: Linux   
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output of journalctl -k -b -1 > dmesg.txt none

Description George R. Goffe 2026-01-23 07:30:59 UTC 
1. Please describe the problem:

Attempting to build the linux-6-19.rc6 kernel with "-j21" operand to make almost always causes the system to freeze and cause the caps-lock key to blink. There is no pattern to the blinks... just a steady blink with no pauses.

2. What is the Version-Release number of the kernel:

6.19.0-0.rc6.260121g6c790212c588f.44.fc44.x86_64


3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :

The last kernel that did NOT have this problem was linux-6.19-rc4. The problem began appearing with linux-6.19-rc5.

4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:

 copy the current running kernel's config entry to linux-6.19-rc6/.config

 make oldconfig

 make -j 21





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``:

Yes

6. Are you running any modules that not shipped with directly Fedora's kernel?:

No

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.





Reproducible: Always
Comment 1 George R. Goffe 2026-01-23 07:36:12 UTC 
Created attachment 2123460 [details]
output of journalctl -k -b -1 > dmesg.txt

Howdy,

I would call this a crash but it's not like any panic/crash I've ever seen. Just a blinking (no pattern) light on the caps-lock key... and a system FREEZE. I was not using the keyboard at all since I was in the other room when the problem appeared.

There was a previous problem like this in the 6.19-rc5 kernel from kernel.org but now there's NO error message(s) that I can see.

Thanks for your help,

George...
Comment 2 George R. Goffe 2026-01-24 05:06:45 UTC 
Howdy,

The problem exists in the "latest" kernel "kernel-6.19.0-0.rc6.260122ga66191c590b3b.45.fc44.x86_64". There doesn't appear to be any messages in the journals (i.e., journalctl -k -b -1). Is that a bug?

The other rc kernels were removed so I'm running kernel-6.18.0-65.fc44.x86_64 now. So far (3 runs), building the rc6 kernel has NOT failed.

I'll rebuild the rc4 kernel which I believe did NOT fail...

More info to come... :-)

Anyone have any hints/tips/suggestions... just chime in.

George...
Comment 3 George R. Goffe 2026-01-24 05:26:58 UTC 
Well... that was a short-lived plan.

Yet another freeze has occurred.

Help!

George...
Comment 4 Charles Haithcock 2026-08-27 22:08:59 UTC 
Hey George,

Similar to the other bug, https://bugzilla.redhat.com/show_bug.cgi?id=2430550 see if the issue is reproduced with the latest fedora 44 kernel and fedora nightly builds.