On Thu, 15 Aug 2019 16:37:05 +0200, Alex Deucher wrote: > > On Thu, Aug 15, 2019 at 10:25 AM Karol Herbst <kherbst@xxxxxxxxxx> wrote: > > > > On Thu, Aug 15, 2019 at 4:20 PM <Mario.Limonciello@xxxxxxxx> wrote: > > > > > > > > There are definitely going to be regressions on machines in the field with the > > > > > in tree drivers by reverting this. I think we should have an answer for all of > > > > those > > > > > before this revert is accepted. > > > > > > > > > > Regarding systems with Intel+NVIDIA, we'll have to work with partners to > > > > collect > > > > > some information on the impact of reverting this. > > > > > > > > > > When this is used on a system with Intel+AMD the ASL configures AMD GPU to > > > > use > > > > > "Hybrid Graphics" when on Windows and "Power Express" and "Switchable > > > > Graphics" > > > > > when on Linux. > > > > > > > > and what's exactly the difference between those? And what's the actual > > > > issue here? > > > > > > DP/HDMI is not detected unless plugged in at bootup. It's due to missing HPD > > > events. > > > > > > > afaik Lyude was working on fixing all that, at least for some drivers. > > If there is something wrong, we still should fix the drivers, not > > adding ACPI workarounds. > > > > Alex: do you know if there are remaining issues regarding that with amdgpu? > > There was an issue with hpd events not making it to the audio side > when things were powered down that was fixed with this patch set: > https://patchwork.freedesktop.org/patch/316793/ > Those patches depended on a bunch of alsa changes as well which may > have not been available in the distro used for a particular OEM > program. FYI, the corresponding commit for ALSA part is destined for 5.4 kernel: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?id=ade49db337a9d44ac5835cfce1ee873549011b27 BTW, Nouveau should suffer from the same problem. The patch to add the audio component support is found at: https://patchwork.freedesktop.org/patch/319131/ thanks, Takashi _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
