[Bug 98461] Radeon and 5k resolution 5120x2880 = corrupted image

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98461

            Bug ID: 98461
           Summary: Radeon and 5k resolution 5120x2880 = corrupted image
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: blesk2 at gmail.com

Created attachment 127570
  --> https://bugs.freedesktop.org/attachment.cgi?id=127570&action=edit
Photo of display

I try to set 2560x2880 resolution on DisplayPort-0 and the same resolution on
DisplayPort-1, but screen is wobbly and distorted.
xrandr --output DisplayPort-0 --mode 2560x2880 --right-of DisplayPort-1
--output DisplayPort-1 --mode 2560x2880

xrandr 
Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 16384 x 16384
DisplayPort-0 connected primary 2560x1440+0+0 (normal left inverted right x
axis y axis) 597mm x 336mm
   3840x2160     60.00 +  60.00  
   2560x1440     59.95*+
   2560x2880     59.98    29.99  
   1920x1200     59.88  
   1920x1080     60.00  
   1600x1200     60.00  
   1680x1050     59.95  
   1280x1024     60.02  
   1280x800      59.81  
   1024x768      60.00  
   800x600       60.32  
   640x480       60.00    59.94  
DisplayPort-1 connected (normal left inverted right x axis y axis)
   848x480       59.74 +
   2560x2880     59.98    29.99  


Monitor: Dell UP2715K
VGA: AMD FirePro W2100

It is related with Bug id 97244 (5k resolution but on Intel card).

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