[Ardour-Users] ardour 4 // slow graphical interface

Alex Lopez aliksandr at gmail.com
Mon May 4 02:41:22 PDT 2015


I'm using Ardour 4.0.0 with a Radeon Mobility X1600 using radeon open 
source driver in Xorg 1.12.4, running kernel 3.12.19avl2-pae (AVLinux 6.04).

If I use radeon with EXA (so I have radeon.modeset=1, using KMS), Ardour 
4 graphics are slow and I notice a high (50%) processor use by xorg 
process. If I use radeon.modeset=0, xorg seems to load the driver radeon 
but using the older acceleration architecture I believe

[    20.482] (==) RADEON(0): Using XAA acceleration architecture
[    20.482] (II) Loading sub module "xaa"
[    20.482] (II) LoadModule: "xaa"
[    20.482] (II) Loading /usr/lib/xorg/modules/libxaa.so
[    20.501] (II) Module xaa: vendor="X.Org Foundation"
[    20.501]    compiled for 1.12.4, module version = 1.2.1
[    20.501]    ABI class: X.Org Video Driver, version 12.1

and actually the Ardour process uses more CPU (and xorg process, less), 
but the graphics and overall user experience is far smoother.

This is strange since I believed radeon driver should work better using 
EXA which enables render acceleration (although I don't really 
understand what this implies).

Well I suspect that I could be getting still far better performance if 
I'm able to correctly configure my driver (or xorg) or use proprietary 
drivers (but I don't know I there is still support for my -now- old 
card). Will I get better performance using the nightly build with 
ARDOUR_IMAGE_SURFACE=1? I think I'm going to try it out and report here.


On 04/25/2015 05:29 PM, Neil wrote:
> On Fri, Apr 24, 2015 at 5:33 PM, Chris Caudle <chris at chriscaudle.org 
> <mailto:chris at chriscaudle.org>> wrote:
>     That is with x.org <http://x.org> X version 1.17, which may not be
>     available in your
>     distribution.  I run Fedora, which usually stays pretty up to
>     date, and
>     the latest release has 1.16.  The beta for the next release (22)
>     just came
>     out, and it has 1.17 in the repositories, so Fedora users will be
>     able to
>     use 1.17 and Mesa 10.5.0 next month.  Extrapolate accordingly
>     based on the
>     release schedule for your favorite distribution.
> I'm using LInux Mint Debian.   Looks like we are rather behind 
> Fedora.  My libglapi-mesa is 9.2.2-1.  xdpyinfo says X.org is 1.14.3.
> Neil
> -- 
> DJ Dual Core's Blog
> http://oldmixtapes.blogspot.com/
> Order without government; Peace without violence.
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