Hi Armin, On 7/9/22 03:33, Armin Wolf wrote: > Hello, > > while trying to write my own WMI driver, i noticed that the WMI bus driver complained > about duplicated WMI UUIDs. After doing some research, i think i found the reason for > these messages: > > Apparently, the ACPI WMI specification by Microsoft treats the _UID of the WMI PnP-device > like a namespace, which means that duplicate UUIDs are llegal if they do not share the same > namespace (= PnP-device). > > In my case, only one wmi-bmof device is used, the rest is filtered out despite laying in > a different namespace since they have the same UUID. > > Could it be theoretically possible to fix this issue with the WMI bus? Yes this has been a known issue for quite a while now, there is a bugzilla for this here: https://bugzilla.kernel.org/show_bug.cgi?id=201885 As pointed out there, patches fixing this have been posted a few years ago already, but they did not get merged. The patches are here: https://lkml.org/lkml/2017/12/8/912 https://lkml.org/lkml/2017/12/8/914 There is one review comment which needs to be addressed: https://lkml.org/lkml/2017/12/9/165 If you can pick these patches up, address the review comment, test them and then submit a version 2 upstream I would be happy to merge this into the platform-drivers-x86 tree. Regards, Hans
