On Fri, Aug 19, 2022 at 4:25 PM Mario Limonciello <mario.limonciello@xxxxxxx> wrote: > > 3 _OSI strings were introduced in recent years that were intended > to workaround very specific problems found on specific systems. > > The idea was supposed to be that these quirks were only used on > those systems, but this proved to be a bad assumption. I've found > at least one system in the wild where the vendor using the _OSI > string doesn't match the _OSI string and the neither does the use. > > So this brings a good time to review keeping those strings in the kernel. > There are 3 strings that were introduced: > > Linux-Dell-Video > -> Intended for systems with NVIDIA cards that didn't support RTD3 > Linux-Lenovo-NV-HDMI-Audio > -> Intended for powering on NVIDIA HDMI device > Linux-HPI-Hybrid-Graphics > -> Intended for changing dGPU output > > AFAIK the first string is no longer relevant as nouveau now supports > RTD3. If that's wrong, this can be changed for the series. > Nouveau always supported RTD3, because that's mainly a kernel feature. When those were introduced we simply had a bug only hit on a few systems. And instead of helping us to debug this, this workaround was added :( We were not even asked about this. I am a bit curious about the other two though as I am not even sure they are needed at all as we put other work arounds in place. @Lyude Paul might know more about these.
