Hi Alexander, On 2/14/24 13:01, Alexander Kobel wrote: > Hi Hans, > > On 14/02/2024 11.54, Hans de Goede wrote: <snip> >> So the idea behind the patch causing your regression was >> that maybe on some hw we need to call "VBDL" which enables >> event reporting after every event to fix event reporting >> sometimes stopping by re-enabling event reporting after >> every event. This assumes that calling "VBDL" more then >> once does not have any side effects, where in your case >> it clearly seems to have several undesirable side-effects. >> >> So again the fix probably is to simply just drop the >> newly added "VBDL" call. > > Thanks for taking the time for an explanation. Sounds like *not* needing the VBDL call should be default, and that rather the devices that need it are quirky. Ack, I completely agree. It never became entirely clear if this call is even necessary to fix the issue of missing tablet-mode-switch events on the Dell Inspiron 7352. So for now I'm just going to drop the "VBDL" ACPI method call again to fix the 2 issues this is causing on the ThinkPad X1 Tablet Gen2. Regards, Hans