[Bug 15037] New: ColorTiling breaks when adding Interlaced modes with xrandr

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Mar 15 17:10:00 PDT 2008


           Summary: ColorTiling breaks when adding Interlaced modes with
           Product: xorg
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: jerj at coplanar.net
         QAContact: xorg-team at lists.x.org

on Radeon Mobility 7500, in an IBM T30 Thinkpad, 1024x768 LCD panel, if VGA
output is connected to RGB monitor with NTSC Interlaced timings, enabling the
output causes the LCD display to "scramble" with rectangular tiles.

Putting Option "ColorTiling" "false" in xorg.conf prevents this issue.  A
recent Git commit did not resolve the issue.

to reproduce (doesn't require a monitor - no DDC is present):

xrandr --newmode NTSCi 14.318 768 784 848 910 483 484 492 525 Interlace -VSync
xrandr --addmode VGA-0 NTSCi
xrandr --output VGA-0 --mode NTSCi

switching VGA-0 to a non-interlaced mode (NTSCp) restores the LCD display.

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