Re: [REGRESSION] 7.1: apple-gmux backlight dead on MacBookPro13,3 - PCI bridge left with VGA enable set and VGA 16-bit decode cleared, aliasing legacy VGA I/O over the gmux ports
Jani Nikula <[email protected]>
| Newsgroups | org.freedesktop.lists.intel-gfx,org.freedesktop.lists.dri-devel |
|---|---|
| Organization | Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs Bertel Jungin Aukio 5, 02600 Espoo, Finland |
| Message-ID | <[email protected]> |
On Tue, 04 Aug 2026, Haram Choi <[email protected]> wrote: > I think I have found the commit. It is not in drivers/pci at all, and > my previous suspicion of 94555ea9a048 was wrong. Apologies to Simon > for the noise. > > The regression is: > > cc6ed470caa2 ("drm/i915/vga: Avoid VGA arbiter during > intel_vga_disable() for iGPUs") > Ville Syrjala <[email protected]>, 2025-12-08 Uh, that's a bit of a bummer. As you can see, I've only acked it, because quite honestly, I don't fully understand what's going on, but I fully trust Ville to follow through with any issues it might cause. Like this one. However, Ville's not available for a few weeks now, and the commit also does not revert cleanly anymore. We can either try to hack together some sort of fix/revert, or wait for Ville's input. BR, Jani. -- Jani Nikula, Intel