dell precision 5530 ACPI errors during tumbleweed startup

English Install/Boot/Login
1

After the Dell logo is displayed, during Tumbleweed startup, I have a long list of kernel errors of the type:

ACPI BIOS Error (bug): Failure creating named object _SB.PCI0.XHC.RHUB.HS01._UPC], AE_ALREADY_EXISTS (20190703/dswload2-323)
ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190703/psobject-220)
…
ACPI BIOS Error (bug): Failure creating named object _SB.PCI0.XHC.RHUB.SS10._PLD], AE_ALREADY_EXISTS (20190703/dswload2-323)
ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20190703/psobject-220)

After suspension (sleep or hibernation) the computer is unable to resume, and I have to use hard shutdown, pressing the power button, to restart.
I installed the last firmware from DELL (BIOS 1.14.0), and the system is up to date.

2

I could solve the sleep resume problem, but not the ACPI errors.

To resume from sleep (S3 mode, suspend to RAM) I modified the file /sys/power/mem_sleep in order to select [deep]:

$> cat /sys/power/mem_sleep
[s2idle] deep
$> echo deep|sudo tee /sys/power/mem_sleep
$> cat /sys/power/mem_sleep
s2idle [deep]

In addition I modified /etc/default/grub as follows:
GRUB_CMDLINE_LINUX_DEFAULT="… mem_sleep_default=deep"
…
GRUB_CMDLINE_XEN_DEFAULT=“vga=0”

and updated grub2:
$> sudo grub2-mkconfig -o /boot/grub2/grub.cfg

Now the sleep mode (activated when I close the laptop lid) works fine.