[Bug 103501] New: Rotation causes screen corruption on Turks XT (HD6670)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103501

            Bug ID: 103501
           Summary: Rotation causes screen corruption on Turks XT (HD6670)
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: centos at markgwoodruff.com
        QA Contact: xorg-team at lists.x.org

Created attachment 135150
  --> https://bugs.freedesktop.org/attachment.cgi?id=135150&action=edit
configuration files, logs, and image of corruption

Rotating a monitor causes screen corruption in ATI video driver version 23.0.
Version 19.0 Works fine. (These correspond to CentOS 7.1708--latest--and .1611
(one earlier). Same version seems to work fine on RV730 (HD4650).

To reproduce:

Install CentOS 7.1708 server with gui with one user (X.Org video driver 23.0,
XInput driver 24.1, Server Extension 10.0, glx 1.19.3, ABI 10.). Rotate monitor
after logging in. Likely could reproduce with Live CD, but haven't tried it.

CentOS 7.1611 (video driver 19.0, XInput driver 21.0, server extension 9.0, ABI
9.0) works fine 

Xorg.0.log, lspcid, dmesg with drm.debug=14 log_buf_len=16M, xrandr output, gdm
monitors.xml configuration, and image of corrupted screen attached

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