[Bug 54273] kms blackscreen ATI RV620 FirePro 2260, res: 2560*1600

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54273

--- Comment #39 from John-Michael Mulesa <thesaxophonist at gmail.com> ---
I believe I'm having this issue as well. I have an RV620 Radeon 3470 with two
displayport outputs (which are the only two outputs on the card.) Both of my
native Displayport displays (HP L2201x and a Dell U2311H, 1920x1080x60 native)
go to "Input not supported" mode as soon as KMS kicks in. However, connecting a
DVI display to an active DP->DVI adapter works perfectly. Using fglrx-legacy
allows native displayport to work on the card. I've tried on kernel 3.9.0 and
3.10rc6 with the same results.

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