[Bug 85621] [IVB DP] FIFO underrun when trying to set a high display mode

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85621

--- Comment #19 from Leho Kraav (:macmaN :lkraav) <leho at kraav.com> ---
(In reply to Jani Nikula from comment #18)
> (In reply to Leho Kraav (:macmaN :lkraav) from comment #17)
> > (In reply to Jani Nikula from comment #16)
> > > This one is pending Ville's CDCLK series.
> > 
> > Does this mean we need a kernel upgrade too for resolution? Or just libdrm?
> 
> As it is, the kernel does not reject some display modes it should. A kernel
> upgrade is required (once the patches are done and merged).

Mhm thanks. If you don't mind what kernel release is Ville targeting with this
stuff? What are the chances of getting backported to LTS kernels?

Fortunately as it happens, the 34" LG has a 3440x1440 50Hz rate as native, and
34" DELL has both 50Hz and 60Hz available, allowing for mostly happy camping at
50Hz.

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