Same issue with 4.15 / Mesa 17.3 / Xorg 1.19.6 on a 290 + Acer GN246HL. No DC the 144 / 120 / etc modes show up, DC only 60hz does.

I'm having a variant of this… cannot go over 1920x1080p

4.15, mesa 17.3, xorg 1.19.6, RX570. Deactivating DC makes resolutions available again.

This should be fixed in our staging branches.

Can you try either the amd-staging-drm-next or drm-next-4.17-wip branch from Alex's repo. You can find it at https://cgit.freedesktop.org/~agd5f/linux/?h=amd-staging-drm-next

(In reply to Harry Wentland from comment #3)
> This should be fixed in our staging branches.
> 
> Can you try either the amd-staging-drm-next or drm-next-4.17-wip branch from
> Alex's repo. You can find it at
> https://cgit.freedesktop.org/~agd5f/linux/?h=amd-staging-drm-next

I confirmed this bug is fixed on amd-staging-drm-next branch (commit: 82beba2883b2). I'll test drm-next.4.17-wip later as well just to be sure. I assume this fix is going to be in kernel 4.16 (or already is)?

BTW I really like what AMD is doing regarding Linux. Thanks.

(In reply to Emanuel Couto from comment #4)
> (In reply to Harry Wentland from comment #3)
> > This should be fixed in our staging branches.
> > 
> > Can you try either the amd-staging-drm-next or drm-next-4.17-wip branch from
> > Alex's repo. You can find it at
> > https://cgit.freedesktop.org/~agd5f/linux/?h=amd-staging-drm-next
> 
> I confirmed this bug is fixed on amd-staging-drm-next branch (commit:
> 82beba2883b2). I'll test drm-next.4.17-wip later as well just to be sure. I
> assume this fix is going to be in kernel 4.16 (or already is)?
> 
> BTW I really like what AMD is doing regarding Linux. Thanks.

Finished testing drm-next-4.17-wip branch (commit: d0d4f398ddc0). This bug is solved in both branches.

Thanks. Marked as fixed.