This implies something is trying to use one of the old DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK format modifiers with DRM-KMS without first checking whether it is supported by the kernel. I had tried to force an Xorg+Mesa stack without my userspace patches to hit this error when testing, but must have missed some permutation. If the stalled Mesa patches go in, this would stop happening of course, but those were held up for a long time in review, and are now waiting on me to make some modifications.

Are you using the modesetting driver in X? If so, with glamor I presume? What version of Mesa? Any distro patches? Any non-default xorg.conf options that would affect modesetting, your X driver if it isn't modesetting, or glamour?


On 6/30/20 4:08 PM, Kirill A. Shutemov wrote:
On Tue, Jun 02, 2020 at 04:06:32PM +1000, Dave Airlie wrote:
James Jones (4):
       drm/nouveau/kms: Support NVIDIA format modifiers

This commit is the first one that breaks Xorg startup for my setup:
GTX 1080 + Dell UP2414Q (4K DP MST monitor).

I believe this is the crucial part of dmesg (full dmesg is attached):

[   29.997140] [drm:nouveau_framebuffer_new] Unsupported modifier: 
[   29.997143] [drm:drm_internal_framebuffer_create] could not create 
[   29.997145] [drm:drm_ioctl] pid=3393, ret = -22

Any suggestions?

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