T4 Pro Ubuntu Server Wifi PCI Error

lgabrielp

I bought recently two T4 Pros expecting to install Ubuntu Server LTS on both.

Wifi worked on Windows 10 before formating. After formating with Ubuntu Server LTS during boot the message appears:
can't change power state from D3cold to D0 (config space inaccessible)
HW_REV=0xFFFFFFFF, PCI issues?

And after Ubuntu boot, no wifi card is detected. But Intel Wireless 7265 shows up in lspci.

Does anyone solved this issue?

Support-03

Hello there,

Please try this :
git clone https://github.com/brektrou/rtl8821cu.git
cd rtl8821cu
sudo ./dkms-install.sh
Reboot

lgabrielp

Ubuntu Server 22.04.2 LTS

It's a problem with the BIOS shipped with the device. It has a buggy version and is incompatible with ACPI.

Booting the computer with flag acpi=off in Linux kernel allows wifi to work, but system is unusable without ACPI functions, it's slow.

tuiguang9

Hello there，
What version of Ubuntu system do you install?

JTek

I have the same issue.
WiFi detected with no issues when running Windows 10.
Fresh install Ubuntu 20.04 Focal Fossa, there is no WiFi detected.  Please assist with solution.

julivs

Hi. I am having the same issue. I installed linux mint xfce.
Really, we can't use the acpi=off flag. The system almost freezes.
Is there a way to change de bios to a working version? Any other solution?
How can we report this issue to the manufacturer?

lgabrielp

Of course it does not work. Why would installing a Realtek driver solve the issue we are having with a Intel Wireless Adapter?

buaya-kun

i have similiar issue on debian 11, debian 12, ubuntu 20, ubuntu 22, the intel wifi/pci not activated from D3cold.
but, it's working fine in debian 10 and ubuntu 18. i can confirm everything works fine on those 2 linux version. i'm using this mini as iot concentrator and it works fine with debian 10 or ubuntu 18. if your requirement allowing you to use those older linux version, use it. it seems it has problem with newer kernel but running fine on older kernel.