[Bug 58115] New: AMD LLANO repeated gpu lockups adn softresets

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=58115

          Priority: medium
            Bug ID: 58115
          Assignee: xorg-driver-ati at lists.x.org
           Summary: AMD LLANO repeated gpu lockups adn softresets
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: kphillisjr at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/Radeon
           Product: xorg

When dealing multiple displays there's some chips that have a hard coded limit
that should never be exceeded. Currently there is probably very few protections
in code to prevent this, and this can ultimately lead to systems being
unbootable.

Test hardware:
Amd A6-3400m (hd6520G) w/ hd6650m dedicated
Linux Mint 13 w/ ubuntu xorg edgers installed.
Radeon driver from xorg edgers.

The test:
Connect 3 displays to an amd llano based pc.
start the machine.
Login
attempt to enable the all three panels (This should not be allowed to "work"
but it passes even though it should fail )
restart pc
attempt to login again ( At this step it should fail)


Please note that the a6-series chips most of the time can only handle two
displays at once, and if you force all three to go, it'll lead to gpu stalls.

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