On 09.01.2017 19:20, Roy Spliet wrote: > Op 09-01-17 om 00:24 schreef Ben Skeggs: >> On 12/24/2016 07:48 PM, Roy Spliet wrote: >>> I've observed this regression on my NVAC board; a 1920x1080 TV on HDMI >>> (single monitor set-up) gets no signal with Fedora kernels from 4.8. >>> Trace sent to the mmio dumps mailbox. A brief scan already revealed that >>> register 0xe840 is never touched, so it appears that NVIDIA does >>> something different. >>> VBIOS for this board is in the usual place. Commenting out 0xac from the >>> workaround seems to solve the problem, as tested on a Fedora 4.9 kernel. >>> I hope that helps you get a little further with this issue. Cheers, and >>> happy holidays! >> Thanks Roy, >> >> NVIDIA told me that it applied to these boards, but, I can't see NVIDIA >> attempting the workaround in your trace, so until there's evidence to >> the contrary, I've disabled it for MCP7x for now. >> >> Ben. > Thanks. Since your patch is the exact modification I made to verify the > workaround was bugging me, consider it: > > Tested-by: Roy Spliet <nouveau@xxxxxxxxxx> > > Given "no display on HDMI since 4.8" is quite a serious regression > (albeit for a small userbase), please consider submitting this to 4.10 > as well as a "back-port" to the upstream 4.8 and 4.9 trees. > Thanks again! Cheers, > > Roy > Thanks Roy Hello Dave, Greg If it is not already, please push for: - stable 4.9.6 - mainline 4.10-rc5 Also: Reported-by: poma <poma@xxxxxxxxx> Tested-by: poma <poma@xxxxxxxxx> Ref. https://lists.freedesktop.org/archives/nouveau/2016-October/026242.html https://github.com/skeggsb/nouveau/commit/2e5fba2.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html