compositing enabled with Radeon mobility X300

Alex Deucher alexdeucher at
Fri Aug 5 13:24:01 UTC 2016

On Fri, Aug 5, 2016 at 5:11 AM, Jethro Tull <heavytull at> wrote:
> From: Michel Dänzer [michel at]
> Sent: Friday, August 5, 2016 1:41 AM
> To: Jethro Tull
> Cc: xorg at
> Subject: Re: compositing enabled with Radeon mobility X300
> On 05.08.2016 06:23, Jethro Tull wrote:
>> I'm using the kernel 4.4.14 with XFCE 4.12, as written in the subject
>> my GPU is a Radeon mobility X300 and the driver used is the open
>> source "radeon".
>> I noticed that enabling compositing was resulting in very slow
>> windows manipulations like dragging, resizing, browsing them with Alt
>> + tab. It takes nearly 2 seconds to display the big contextual menu
>> when starting to browse through the windows. And I also noticed that
>> using an extended desktop on a second monitor was leading to some
>> windows not being refreshed resulting in a nearly scrambled desktop
>> after some time of use with several graphical programs. I also
>> noticed some similar problems with the terminal.
> Please provide the corresponding Xorg log file.
> --
> Earthling Michel Dänzer               |     
> Libre software enthusiast             |             Mesa and X developer
> here it is:

Please include the full log and your dmesg output.  How many displays
are you using?  What resolution(s)?


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