On 02/02/2017 04:48 PM, Ilia Mirkin wrote: > On Thu, Feb 2, 2017 at 4:43 PM, Phil Turmel <[email protected]> wrote: >> On 02/01/2017 10:40 AM, Phil Turmel wrote: >>> Hi All, >>> >>> I've been running Gentoo on a ZBook with great success for a couple years, >>> but I've been stymied in my attempts to implement SecureBoot by an >>> apparent problem with efifb to nouveaufb handoff, but only when external >>> monitors are attached. The handoff works without issue when the BIOS is >>> in Mixed EFI mode, with and without external monitors, and >>> works in Native EFI mode without external monitors. >> >> Sorted by nouveau.config=NvForcePost=1 > > Bleh. That's unfortunate. Presumably in "Native EFI" mode, displays > work fine with efifb until nouveau takes over?
Yes, at least the laptop's built-in display. The external displays aren't activated in the brief time between efifb startup (penguins) and handoff to nouveaufb. > There was a time when the blob did *something* weird which defeated > nouveau's display logic (when flipping between the two drivers). > Perhaps this Native EFI mode does something along those lines as well. > (Although in those cases, running the VBIOS didn't help... although > each VBIOS is a unique snowflake. In some other cases, double-running > the VBIOS leads to a hung GPU. Urgh.) I'm open to experiments. I've moved to vanilla 4.8.17 from 4.8.15 and will jump into 4.9.x this weekend. I'll check with and without NvForcePost as I upgrade. Not gonna hold my breath, though -- I first noticed this a couple years ago and it hasn't been a priority. But note, the handoff *does* work without NvForcePost if there are no external monitors. That's what's had me scratching my head. Phil _______________________________________________ Nouveau mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/nouveau
