Hallo Harald, On Fri, Sep 04, 2026 at 11:28:40AM +0200, Harald Geyer wrote: > Package: src:linux > Version: 7.1.12-1 > Severity: important > > Dear Maintainer, > > after upgrading my setup from trixie to forky, the system stopped > coming up. Just switching boot.scr to load the old kernel > (6.12.43+deb13) was enough to get the systems up again. (This report is > created with 6.12.43+deb13 running.) > > After attaching a serial console output was captured - see below. > Note: I did the investigation with 7.1.8+deb14.1. I then upgraded the > kernel to 7.1.12+deb14 and can confirm that 7.1.12+deb14 is affected > too. (However, I didn't get the serial output of 7.1.12+deb14, because > the setup with the serial console is not at the same location.) > > A few noteworthy facts about serial output: > * The output just stops without any error message. > * The output stopped at slightly different times of the boot process > every time I tried.
I didn't compare your two logs, but I suspect that the difference is
just the order of the messages because drivers are loaded asynchronously
and thus the timing is slightly different each time.
> * The hardware itself mostly seems up. LEDs are on, USB is powered etc.
> * If I type something into the serial console, I actually get the echo
> back.
>
> I don't know, what to make of this combination of symptoms or how to
> investigate further.
>
> Attached you find:
> boot_fail*.log - the serial output of two attempts with a broken
> kernel.
> boot_okay.log - the output when booting the last known to work version.
A few ideas for debugging:
- How long did you wait for further output once it stopped?
- please add
sysrq_always_enabled
to the kernel commandline and when the hung state is reached send a
break on the serial console and then a `t`. Ideally that provides a
bunch of output.
- Does it help if you add
root=/dev/mmcblk0p2
to the kernel command line? (Is mmcblk0p2 the right device?)
Comparing the boot logs I see that 7.1 has considerably less messages
for ata (i.e. hard disks).
- Can you provide the boot log of a boot with
debug
on the commandline?
- Can you please provide the 7.1 initrd?
If anything here is unclear, don't hesitate to ask. Either here, or if
you prefer in #debian-arm (highlight me (= ukleinek)).
Best regards
Uwe
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