[Bug 564559] Re: URGENT for upcoming release: Resolutions requiring dual link DVI on radeon result in no display

[Matej Kenda]

I have very similar problem with ATI Technologies Inc Radeon Mobility HD
3670.

By using latest upstream kernel (2.6.34-999-generic #201004211003) it is
possible to use dual head, but the cable for the external monitor may be
connected only after I log in.

If the cable is connected before login prompt then both screens become
black when login should appear (boot splash is displayed). Note that I
use Kubuntu, didn't try on Ubuntu yet).

I tried the kernel mentioned in Comment 3, but it didn't help.

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URGENT for upcoming release: Resolutions requiring dual link DVI on radeon result in no display
https://bugs.launchpad.net/bugs/564559
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