Re: HP ProBook 6550b hangs on kernels above 14.0-RELEASE

Hi Adrian!

Thanks for looking into this!

Yes, it might very well be an ACPI-issue. I noticed the kernel is not 
completely locked up when I boot 16.0-CURRENT. If I do a verbose boot 
and press the power button (at the point where the system has stopped 
booting) another message appears on the console:

AcpiOsExecute: task queue not started

Every time I press the power button this line gets repeated.

I'm not sure if this is helpful in providing info about the hardware in 
this laptop but I installed 14.0-RELEASE on it so I could run pciconf -l 
-v, devinfo -r -v and do a verbose boot.

If you need more info, just let me know.
And if there is anything I can do so you don't have to get one of these 
laptops let know too.

The output of the commands seems a bit much to include in this mail so 
they're at pastebin:
devinfo: https://pastebin.com/6svCYbCF
pciconf: https://pastebin.com/N2TJKHLx

Kind regards!
Michael


On 22-11-2025 16:30, Adrian Chadd wrote:
> hi!
>
> The observation in the post about it being ACPI is also very valid.
>
> Can you share more specific details about the hardware in the laptop? 
> It looks like I can pick one up cheap on ebay,
> and if it's an ACPI problem i'm likely going to need to add printf 
> debugging everywhere to give the ACPI maintainer
> some more information. ;-)
>
>
>
> -adrian
>
>
> On Tue, 18 Nov 2025 at 11:21, Michael <opensource@uitveenendaal.nl> wrote:
>
>     Hello,
>
>     ====
>     One of my old laptops (HP ProBook 6550b) was running FreeBSD
>     14.0-RELEASE (amd64) perfectly fine, but upgrading to anything higher
>     results in a boot that hangs at the line:
>     psm0: model Synaptics Touchpad, device ID 0
>
>     A while ago I tried upgrading to 14.1-RELEASE and run into this
>     problem.
>     Back then I decided to wait, hoping this glitch would be ironed
>     out in a
>     later release. But today experimenting with 14.3-RELEASE and
>     15.0-STABLE
>     from 20251113 I got the same results.
>
>     It would be great to find a fix for this and would like to help
>     troubleshooting this issue. I'm not even close to a kernel developer
>     though, but perfectly capable of gathering all kinds of
>     information (I'm
>     a FreeBSD-user since version 4.4) and help testing.
>     ====
>
>     This is what I posted on the FreeBSD forum. The post is here:
>     https://forums.freebsd.org/threads/hp-probook-6550b-not-booting-14-3-release-15-0-stable.100065/
>
>     The conclusion there was to try again on this mailing list.
>
>     I tried kernels 14.1-RELEASE, 14.3-RELEASE, 15.0-STABLE and the most
>     recent version I tested with is
>     FreeBSD-16.0-CURRENT-amd64-20251110-dbb34d496708-281771
>     The problem is still there. It seems the system locks up since
>     scolling
>     back up doesn't work either.
>
>     I wonder if anyone is willing to look into this. The offer to help
>     troubleshooting this and test a solution (if any) stands.
>
>     Kind regards,
>     Michael
>