[amdgpu][tahiti xt] cursor motion smoothness

[Michel Dänzer]

On 2018-07-03 10:54 AM, Michel Dänzer wrote:
> On 2018-07-02 10:10 PM, sylvain.bertrand at gmail.com wrote:
>> On Mon, Jul 02, 2018 at 06:43:48PM +0200, Michel Dänzer wrote:
>>>> Sending the logs as direct email to your personal email box.
>>>
>>> Does using xf86-input-libinput instead of xf86-input-evdev help?
>>
>> I did plan to switch to libinput in the futur, but:
>>
>> I did test the xinput events and I get for a reasonable mouse motion speed an
>> update of coords for each column of the screen (full hd).
>>
>> It means that the cursor is supposely displayed for nearly all columns of the
>> screen. For a fast mouse motion, the coord updates jump to a few tens of
>> pixels.  (1000Hz mouse)
>>
>> Those numbers does not change from 60Hz to 144Hz, then I can rule out the input
>> code.
>>
>> If it's not my eyes or the screen itself, the pb will be in the cursor update
>> code path from the xserver down to the driver...
> 
> Unless your xserver build ends up with INPUTTHREAD undefined for some
> reason, input events are processed in a separate thread, and the HW
> cursor position is updated accordingly ASAP.

Also make sure you do not pass -dumbSched on the Xorg command line, and
do not disable Option "SilkenMouse" in xorg.conf.


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer