something important I should've mentioned before: the machine I'm talking about is a Desktop selfmade, not a notebook. please see https://susepaste.org/61256393 one of my output and key strings which has been kindly spotted from a forum user: localhost kernel: Call Trace: localhost kernel: i915_driver_probe+0x699/0xca0 [i915] localhost kernel: ? vga_switcheroo_client_probe_defer+0x1f/0x40 ab250 kernel: acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM ab250 dbus-daemon[489]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.Avahi.service': Refusing activation, D-Bus is shutting down. Thanks.