Re: [REGRESSION] hp_bioscfg hangs boot on HP Laptop 15-bs1xx; blacklisting fixes it

[Thorsten Leemhuis]

Hi! Thx for your report.

On 8/23/26 02:36, VOLKAN SALİH wrote:
> 
> I am seeing a boot regression involving hp_bioscfg on an HP Laptop
> 15-bs1xx.
> 
> System:
>   Model: HP Laptop 15-bs1xx
>   SKU: 7WG51EA#AB8
>   Mainboard: HP 8444
>   BIOS: F.75 (04/26/2024)
>   GPU: Intel HD Graphics 5500 / Broadwell-U [8086:1616]
>   Distribution: Zorin OS 18.1 Pro (Ubuntu 24.04 based)
> 
> Kernel results:
>   6.17.0-40-generic:
>     boots normally
> 
>   7.0.0-30-generic:
>     hangs during boot
> 
>   7.0.0-30-generic with acpi=off:
>     boots
> 
>   7.0.0-30-generic with only hp_bioscfg blacklisted:
>     boots normally with ACPI enabled

The latter three are heavily patches vendor kernels. Please test if
vanilla 7.2 is still affected and report back if it is; if not, you want
to talk to your vendor about backporting fixes, as 7.0 is EOL and thus
unsupported upstream.

Ciao, Thorsten
> The working kernel command line workaround is:
> 
>   module_blacklist=hp_bioscfg modprobe.blacklist=hp_bioscfg
> 
> The boot reaches hp_bioscfg initialization immediately before the hang.
> The WMI GUID shown during probing is:
> 
>   5FB7F034-2C63-45E9-BE91-3D44E2C707E4
> 
> The system also reports these firmware ACPI errors:
> 
>   ACPI BIOS Error (bug): Could not resolve symbol
>   [\_SB.PCI0.LPCB.HEC.ECRD], AE_NOT_FOUND
> 
>   ACPI Error: Aborting method \_TZ.TZ00._TMP due to previous error
>   ACPI Error: Aborting method \_TZ.TZ01._TMP due to previous error
> 
> I inspected the hp_bioscfg module from Ubuntu's 7.0.0-30 kernel:
> 
>   /lib/modules/7.0.0-30-generic/kernel/drivers/platform/x86/hp/hp-bioscfg/hp-bioscfg.ko.zst
> 
> It contains the old error strings:
> 
>   hp_bioscfg: ACPI-package does not have enough elements: %d < %d
>   Error expected type %d for elem %d, but got type %d instead
> 
> I noticed the recent patch series:
> 
>   "platform/x86: hp-bioscfg: fix ACPI package handling on HP EliteBook 840 G2"
> 
> including:
> 
>   e0ddfd77c0c3 - pass validated element count to package parsers
>   1d143d78299d - bound ordered-list parsing by package count
>   40e10e6cc8f7 - accept reduced ACPI packages from older HP BIOS
>   b0e2af3ec94e - warn on element type mismatch instead of failing
> 
> The series was applied to the platform-drivers-x86 review-ilpo-next
> branch.
> 
> Could this HP 15-bs1xx boot hang be another manifestation of the same
> older-HP-BIOS ACPI package handling problem?
> 
> If so, would these fixes be suitable for backporting to the affected
> stable/vendor kernel series?
> 
> I can test patches or a patched hp_bioscfg module on this machine.
> 
> Regards,
> mr.Volkan SALiH
>