[Bug 56834] [ivb DP dual link DVI dongle] [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56834

Anthony Foiani <anthony.foiani at gmail.com> changed:

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                 CC|                            |anthony.foiani at gmail.com

--- Comment #20 from Anthony Foiani <anthony.foiani at gmail.com> ---
I'm having the same issue, using an outboard DisplayPort to Dual-Link DVI-D
adapter.

Adapter: Accell B087B-007B
http://www.amazon.com/gp/product/B00856WJH8

Computer is a Dell Optiplex 990 USFF ("ultra small form factor"), CPU is
i7-2600S, using CPU graphics (HD2000 I think?).  OS is Fedora 18 x86_64, fully
up-to-date.  More system info:
http://paste.fedoraproject.org/12071/45046136/

For whatever it's worth, Windows 7 sees the full resolution without a problem. 
I'm pretty sure that grub sees it correctly as well.

If I connect this computer directly to the monitor using a DisplayPort cable,
then it works fine.  (I prefer to use the DL DVI-D so I can use my KVM switch.)

It might be worth noting that Luke originally filed a downstream bug:
https://bugzilla.redhat.com/show_bug.cgi?id=842412
Not much more information there, but it can't hurt to have them linked.

As I noted in that bug, and as others mentioned elsewhere in this bug, I can
work past the erorr by using xrandr directly:

xrandr --newmode '2560x1440_0.0' 241.50  2560 2608 2640 2720  1440 1443 1448
1481 +hsync -vsync
xrandr --addmode DP1 '2560x1440_0.0'

Is there any info I can provide to help fix this?

Thanks,
Tony

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