On Thu, Aug 15, 2019 at 12:19 PM <Mario.Limonciello@xxxxxxxx> wrote: > > > -----Original Message----- > > From: Takashi Iwai <tiwai@xxxxxxx> > > Sent: Thursday, August 15, 2019 9:57 AM > > To: Alex Deucher > > Cc: Karol Herbst; Limonciello, Mario; nouveau; Rafael J . Wysocki; LKML; dri-devel; > > Linux ACPI Mailing List; Alex Hung; Ben Skeggs; David Airlie > > Subject: Re: [Nouveau] [PATCH 1/7] Revert "ACPI / OSI: Add OEM _OSI string to > > enable dGPU direct output" > > > > > > [EXTERNAL EMAIL] > > > > 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=ade > > 49db337a9d44ac5835cfce1ee873549011b27 > > > > 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/ > > > > > > It sounds like 5.3rcX won't be a useful check then. > > So am I correct to understand that everything related to the AMD failures > described in this thread should be in linux-next at this point? > Assuming you mean the missing audio hotplug events, then yes. Alex _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
