GPD Win Max 2 - QubesOS

gpdwinmax2-qubes.md

GPD Win Max 2 - QubesOS 4.1

Firmware Settings

1. Get to firmware settings by tapping "Del" while booting
2. Alt+F5 then reboot and return to firmware settings to get secondary "Advanced" menu
3. Advanced -> CPU Configuration -> SVM Mode -> Enabled
4. Advanced -> PCI Subsystem Settings -> SR-IOV Support -> Enabled
5. Advanced -> AMD CBS -> NBIO Common Options -> IOMMU -> Enabled

Boot issues

• Must set x2apic=false in xen*.gz grub line during install
• In dom0: echo 'GRUB_CMDLINE_XEN_DEFAULT="$GRUB_CMDLINE_XEN_DEFAULT x2apic=false"'

Wifi Issues

• Must use usb ethernet or wifi after install to apply updates
• Switch to kernel-latest (6x or newer)

USB issues

External USB ports are unable to resume after usbcore suspends them. To avoid losing the ports on a given boot, we must prevent dom0 from seeing the usb controllers, then ensure the kernel inside the sys-usb templatevm disables usbcore autosuspend functionality.

• Create 'sys-usb' qube, adding all USB PCI controllers manually
  • Below assumes debian-11 is used
  • Ensure it does -not- start on boot until it is confirmed working
• In dom0:

  echo 'GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX rd.qubes.hide_all_usb"'
  grub2-mkconfig -o /boot/efi/EFI/qubes.cfg
  

• In sys-usb template VM:

  echo 'GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX usbcore.autosuspend=-1"'
  grub-mkconfig -o /boot/grub/grub.cfg
  

Suspend issues

This is currently not working. Here is what we know so far.

Suspend to idle

• Sleep:
  • echo freeze > /sys/power/state
  • screen turns off
  • power led still on
  • keyboard backlight still on
• Wake:
  • Unresponsive
  • Must hard reset

Suspend to ram

• Sleep:
  • echo mem > /sys/power/state
  • screen turns off
  • power led pulses
  • keyboard backlight turns off
• Wake:
  • keyboard backlight turns on
  • power led goes solid
  • Unresponsive
  • Must hard reset

Suspend to disk

• Sleep:
  • echo disk > /sys/power/state
  • "bash: echo: write error: function not implemented"
• Wake:
  • N/A

Debug attempts

• mem_sleep_default=deep in kernel cmdline
  • no impact
• Advanced -> AMD PBS -> Power Saving Configurations -> Modern Standby Enable
  • had no impact
  • A lot of other options in this menu are potentially of interest

Debug todo

• Start disabling XCHI devices one by one
  • echo XHC1 > /proc/acpi/wakeup
    • One owner reported this stopped machine from instantly waking after a suspend on Ubuntu.