1 Reply Latest reply on Aug 4, 2016 12:29 PM by arturb

    amdgpu + UHD + DisplayPort 1.2 missing 3840x2160

    arturb

      I cannot force  the amdgpu-pro driver to allow me using 3840x2160 resoultion with DiplayPort 1.2 cable, this is realy ridiculus since it allows using it whit HDMI cable.

      Using this iwth HDMI is a pain because HDMI only allows 30Hz for this 3840x2160 resulution.

      With Catalys drivers there were no problems at all.

      I have got an R9 390X gfx.

      As I see problem is in driver because in Xorg.0.log it show that the DisplayPort is not capable, and monitor reports proper EDID.

      [     5.600] (II) AMDGPU(0): EDID (in hex):
         [     5.600] (II) AMDGPU(0):      00ffffffffffff004c2d800b00000000
        [     5.600] (II) AMDGPU(0):      34170104b53d23783a5fb1a2574fa228
        [     5.600] (II) AMDGPU(0):      0f5054bfef80714f810081c08180a9c0
      [     5.600] (II) AMDGPU(0):      b300950001014dd000a0f0703e803020
        [     5.600] (II) AMDGPU(0):      35005f592100001a565e00a0a0a02950
        [     5.600] (II) AMDGPU(0):      302035005f592100001a000000fd0038
        [     5.600] (II) AMDGPU(0):      4b1e8636000a202020202020000000fc
        [     5.600] (II) AMDGPU(0):      00553238443539300a2020202020016e
        [     5.600] (II) AMDGPU(0):      02030ef041102309070783010000023a
        [     5.600] (II) AMDGPU(0):      801871382d40582c45005f592100001e
        [     5.600] (II) AMDGPU(0):      00000000000000000000000000000000
        [     5.600] (II) AMDGPU(0):      00000000000000000000000000000000
        [     5.600] (II) AMDGPU(0):      00000000000000000000000000000000
         [     5.600] (II) AMDGPU(0):      00000000000000000000000000000000
        [     5.600] (II) AMDGPU(0):      00000000000000000000000000000000
        [     5.600] (II) AMDGPU(0):      00000000000000000000000000000044
        [     5.600] (II) AMDGPU(0): Printing probed modes for output DisplayPort-0
        [     5.600] (II) AMDGPU(0): Modeline "2560x1440"x60.0  241.50  2560 2608 2640 2720  1440 1443 1448 1481 +hsync -vsync (88.8 kHz e)
        [     5.600] (II) AMDGPU(0): Modeline "1920x1080"x60.0  148.50  1920 2008 2052 2200  1080 1084 1089 1125 +hsync +vsync (67.5 kHz e)
        [     5.600] (II) AMDGPU(0): Modeline "1920x1080"x59.9  148.35  1920 2008 2052 2200  1080 1084 1089 1125 +hsync +vsync (67.4 kHz e)

      Monitos reports it is capable of this resolution

      [    36.144] (II) AMDGPU(0): EDID vendor "SAM", prod id 2944 
        [    36.144] (II) AMDGPU(0): Using EDID range info for horizontal sync
        [    36.144] (II) AMDGPU(0): Using EDID range info for vertical refresh
        [    36.144] (II) AMDGPU(0): Printing DDC gathered Modelines:
        [    36.144] (II) AMDGPU(0): Modeline "3840x2160"x0.0  533.25  3840 3888 3920 4000  2160 2163 2168 2222 +hsync -vsync (133.3 kHz eP)
        [    36.144] (II) AMDGPU(0): Modeline "2560x1440"x0.0  241.50  2560 2608 2640 2720  1440 1443 1448 1481 +hsync -vsync (88.8 kHz e)
         [    36.144] (II) AMDGPU(0): Modeline "1920x1080"x0.0  148.50  1920 2008 2052 2200  1080 1084 1089 1125 +hsync +vsync (67.5 kHz e)

      Is there a way to fix this and use 3840x2160 with DisplayPort 1.2 cable ?