[Bug 99784] New: Multiple monitor problem on AMD 7470m

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99784

            Bug ID: 99784
           Summary: Multiple monitor problem on AMD 7470m
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: lazanet96 at gmail.com
        QA Contact: xorg-team at lists.x.org

Monitors are correctly reported in xrandr, however when both VGA (ASUS VW193)
and internal laptop monitor (ASUS K55DR) are connected, image is only shown on
one screen at the time. When HDMI output is connected (another monitor or tv)
image is displayed seemingly random (either both HDMI and VGA output image, or
only VGA, or internal monitor and HDMI - but never all three or VGA and
internal monitor at the same time). Also at 1080i screen glitches (as seen on
ubuntu bug report).

Hardware is functional under Windows or fglrx drivers

Original issue was reported @ launchpad.net here
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1553441 
That bug report contains log files from xOrg, and images that could better
explain bug that is affecting me (as I'm not native speaker, if that isn't
obvious enough :)). If necessary I can provide more logs from latest mainline
kernel.

Last kernel version which I tested (and reproduced bug) was mainline Ubuntu
4.10.0-041000rc7-lowlatency

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