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. -- URGENT for upcoming release: Resolutions requiring dual link DVI on radeon result in no display https://bugs.launchpad.net/bugs/564559 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
