[Bug 60523] Radeon DPM not working with 2 monitors attached to Radeon HD5770 (Juniper)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=60523

--- Comment #30 from Christian Birchinger <joker at netswarm.net> ---
Maybe the same reason why Tobias is stuck at level 2.

Since i'm no longer able to use tools like xvidtune and the online modeline
calculator tells me 1600x1200 85hz requires >300Mhz pixel clock, so i'm
probably
stuck at trying out lots of predefined modes that got pasted online.

How would i calculate the vblank period from modelines? It would really help
if i at least knew a mode is within the specs before trying it out.

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