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I am using Ubuntu GNOME 16.04 and I would like to know if there is a way to get amdgpu-pro driver to properly vsync. I have tried modifying the xorg file to look like:

Section "OutputClass"
        Identifier "amdgpu-pro"
        MatchDriver "amdgpu"
        Driver "amdgpu"
        Option "TearFree" "on"
EndSection

but all that managed to do is break the graphics part all together (gdm crashed or was stuck during next boot).

mmm3743
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2 Answers2

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Create a file named /usr/share/X11/xorg.conf.d/99-tearfree.conf and containing Code:

Section "Device"
Identifier "Card0"
Driver "amdgpu"
BusID "PCI:1:0:0"
Option "DRI3" "1"
Option "TearFree" "on"
EndSection

You have the same option in the open source driver too: Use the command man amdgpu to see them all. In Xfce you use the desktop compositor to prevent window tearing.

Hope it helps

B.B.M
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  • It's actually Option "DRI3" "3". According to http://jlk.fjfi.cvut.cz/arch/manpages/man/amdgpu.4 this will set the level of DRI used, in ideal cases (and if Xorg supports it), we want it to be 3. – showp1984 Dec 25 '17 at 21:35
  • When doing this I get a "no monitors found" or something like that error on X.log, anybody knows why? – Darkhogg May 15 '18 at 17:37
  • It's "DRI" "3" if the manpage is to go by

    Option "DRI" "integer" Define the maximum level of DRI to enable. Valid values are 2 for DRI2 or 3 for DRI3. The default is 3 for DRI3 if the Xorg version is >= 1.18.3, otherwise 2 for DRI2.

     – regomodo Nov 26 '18 at 17:24
  • to get the correct BusID, run lspci |grep VGA, see https://wiki.archlinux.org/index.php/xorg – Tobias J Jan 08 '19 at 23:33
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I feel very dumb, didn't notice that the default generated file is for Section "OutputClass", what was needed is Section "Device". It's all good now.

mmm3743
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