[Bug 31984] New: [radeon] Commit 3455a3 Introduces Display Correction on Portrait Orientation on Evergreen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=31984

           Summary: [radeon] Commit 3455a3 Introduces Display Correction
                    on Portrait Orientation on Evergreen
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: matt at mattcox.ca
         QAContact: xorg-team at lists.x.org


Hardware: Radeon HD 5770
Displays: 2x Dell 2209W via DVI outputs
Kernel: 2.6.36.1
Xorg Server: 1.9.2
Mesa: 7.9
Using Kernel Mode Setting

The following commit

    commit 3455a3b58532ea3ad901a317126968ab6cbb21b7
    Author: Alex Deucher <alexdeucher at gmail.com>
    Date:   Wed Nov 17 17:32:41 2010 -0500

        radeon/kms: fix buffer base alignment for tiling

        On r6xx+, 2D tiling can require larger than 4k base alignment.

causes display corruption when the displays are placed in portrait orientation.

There're no differences between the `dmesg | grep drm` and `Xorg.0.log` files
between working versions before this commit and the broken ones including and
after this one.

Display corruption occurs when the portrait orientation is set via either
`xorg.conf` or `xrandr` after X is started in landscape mode.

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