Force VSync setting on Linux

.drirc

<device screen="0" driver="dri2">
	<application name="Default">
		<option name="vblank_mode" value="1"/>
	</application>
</device>

comment.txt

Create the above file in the home directory: ~/.dridr

vblank_mode:

0 - Never synchronize with vertical refresh, ignore application's choice
1 - Initial swap interval 0, obey application's choice
2 - Initial swap interval 1, obey application's choice
3 - Always synchronize with vertical refresh, application chooses the minimum swap interval