Erreur inattendue au démarrage/ unexpected error just after boot

Depuis quelques jours, j’ai un étrange affichage juste après le boot sur mes deux machines Manjaro (une sous XFCE, une sous Manjaro) : “erreur inattendue” (unexpected error). Je ne comprends pas pourquoi et comment la faire disparaître.

Since few days, I have a strange display just after boot on my two Manjaro computers (one with XFCE, the other with KDE) : “erreur inattendue” (unexpected error). I don’t understand why and how to fix it.

Merci ! Thanks!
P.

Je dois ajouter que tout fonctionne bien après la validation du message.

I must add thar after validation of the display, everything is going normally fine.

P.

Could you provide more informations ?

I will try to be more clear. My config is:
computer HP ProBook
linux distribution: Manjaro KDE
kernel release: 5.11.14-1-MANJARO
CPU Model: Intel Core i7-6820HQ
CPU Core: 8
CPU Speed: 2.7GHz
Memory: 15.5 GiB
Display controller : HD Graphics 530 Intel - video-linux
(the Nvidia Controller is disabled because of linux compatibility issue)
Language: French

When the boot is completed and before any other action, I have a warning sound and the following message is displayed:
Screenshot_20210422_075524 :
[Unexpected error. Close]

I click on “Fermer” and the computer works apparently well.

I encounter the same issue on another computer with the following config:
computer HP ZBook 14
linux distribution: Manjaro XFCE
kernel release: 5.11.14-1-MANJARO
CPU Model: Intel Core i7-46000
CPU Core: 4
CPU Speed: 2.1GHz
Memory: 7.7 GiB
Display controller :
Mars Radeon HD8730M - video-linux
Haswell-ULT integrated Gaphics Controller (Intel)
(the Nvidia Controller is removed because of linux compatibility issue)
Language: French

My question is: what is the cause and how to remove this error message ?

Thanks and regards.
P.

After some researches, it seams taht the error is coming from the following process:

/
avril 23 07:40:51 Khar kernel: ACPI Error: Needed [Buffer/String/Package], found [Integer] 0000000033a54153 (20201113/exresop-557)
avril 23 07:40:51 Khar kernel: ACPI Error: AE_AML_OPERAND_TYPE, While resolving operands for [Index] (20201113/dswexec-431)
avril 23 07:40:51 Khar kernel: ACPI Error: Aborting method _SB.WMIV.WVPO due to previous error (AE_AML_OPERAND_TYPE) (20201113/psparse-529)
avril 23 07:40:51 Khar kernel: ACPI Error: Aborting method _SB.WMIV.WMPV due to previous error (AE_AML_OPERAND_TYPE) (20201113/psparse-529)
avril 23 07:40:51 Khar kernel: ACPI Error: Needed [Buffer/String/Package], found [Integer] 000000009ca861f6 (20201113/exresop-557)
avril 23 07:40:51 Khar kernel: ACPI Error: AE_AML_OPERAND_TYPE, While resolving operands for [Index] (20201113/dswexec-431)
avril 23 07:40:51 Khar kernel: ACPI Error: Aborting method _SB.WMIV.WVPO due to previous error (AE_AML_OPERAND_TYPE) (20201113/psparse-529)
avril 23 07:40:51 Khar kernel: ACPI Error: Aborting method _SB.WMIV.WMPV due to previous error (AE_AML_OPERAND_TYPE) (20201113/psparse-529)
avril 23 07:40:51 Khar kernel: input: HP WMI hotkeys as /devices/virtual/input/input12
avril 23 07:40:51 Khar kernel: ACPI Error: Needed [Buffer/String/Package], found [Integer] 00000000be2726df (20201113/exresop-557)
avril 23 07:40:51 Khar kernel: ACPI Error: AE_AML_OPERAND_TYPE, While resolving operands for [Index] (20201113/dswexec-431)
avril 23 07:40:51 Khar kernel: ACPI Error: Aborting method _SB.WMIV.WVPO due to previous error (AE_AML_OPERAND_TYPE) (20201113/psparse-529)
avril 23 07:40:51 Khar kernel: ACPI Error: Aborting method _SB.WMIV.WMPV due to previous error (AE_AML_OPERAND_TYPE) (20201113/psparse-529)

Any idea for fixing it?

Regards.
P.