Allright,

didn't think it would be that easy...

Since I didn't find /etc/default/grub nor update-grub -like commands nor any hints on where to look I just gave altering /boot/grub/efi/EFI/xenserver/grub.cfg a try. Simply by adding an entry

menuentry 'XCP-ng no aspm' {
        search --label --set root root-heucgb
        multiboot2 /boot/xen.gz dom0_mem=2544M,max:2544M watchdog ucode=scan dom0_max_vcpus=1-8 crashkernel=256M,below=4G console=vga vga=mode-0x0311
        module2 /boot/vmlinuz-4.19-xen root=LABEL=root-heucgb ro nolvm hpet=disable console=hvc0 console=tty0 quiet vga=785 splash plymouth.ignore-serial-consoles append pcie_aspm=off
        module2 /boot/initrd-4.19-xen.img
}

and making that the default entry seems to do the magic. No initrd recompile necessary apparently.

Solemn

Hi,

To start with, I am using xen-server and xcp-ng in my home environment for a couple of years now, a big thanks to the devs for making this possible in a free version! Currently I am upgrading hardware as well as xen version and ran into an issue:

The new platform will be a Minisforum XTX780, Ryzen 7 7840HS. Installation worked out fine, but kern.log constantly logs errors:

Dec 18 20:14:11 mini kernel: [17703.715477] pcieport 0000:00:02.1: AER: Corrected error received: 0000:00:02.1
Dec 18 20:14:11 mini kernel: [17703.715489] pcieport 0000:00:02.1: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Receiver ID)
Dec 18 20:14:11 mini kernel: [17703.715506] pcieport 0000:00:02.1:   device [1022:14ee] error status/mask=00000040/00006000
Dec 18 20:14:11 mini kernel: [17703.715513] pcieport 0000:00:02.1:    [ 6] BadTLP

What I found so far is that it is somehow related to Active State POwer Management (ASPM) and can be avoided by adding boot kernel parameters "pcie_aspm=off"

Playing around a bit in the grub menu I actually managed to solve the error (at least no further errors have been logged) by adding the parameter to

menuentry 'XCP-ng' {
        search --label --set root root-heucgb
        multiboot2 /boot/xen.gz dom0_mem=2544M,max:2544M watchdog ucode=scan dom0_max_vcpus=1-8 crashkernel=256M,below=4G console=vga vga=mode-0x0311
        module2 /boot/vmlinuz-4.19-xen root=LABEL=root-heucgb ro nolvm hpet=disable console=hvc0 console=tty0 quiet vga=785 splash plymouth.ignore-serial-consoles **append pcie_aspm=of**
        module2 /boot/initrd-4.19-xen.img
}

When trying to make this a permanent boot parameter, I found that in EFI times grub doesn't seem to work like I am used to and since I don't want to break my boot routine, what is the way to permanently append this to the boot entry?

Cheers,

Solemn