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Re: [Libreboot] VGA Output Slow With GNOME

From: Joshua Bowren
Subject: Re: [Libreboot] VGA Output Slow With GNOME
Date: Sat, 17 Oct 2015 16:12:58 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.8.0

To my knowledge default GNOME always uses 3D acceleration. GNOME used to have a fall back version that omitted 3D acceleration, but it seems that newer versions of GNOME (mine being 3.14.1) always use 3D acceleration. So 3D acceleration was always activated in my tests.

Interesting that KDE did not have any issues. I thought KDE always uses 3D acceleration as well, so this might just be a GNOME issue.

El 17/10/15 a las 08:31, Denis 'GNUtoo' Carikli escribió:
On Fri, 16 Oct 2015 15:04:35 -0400
Joshua Bowren <address@hidden> wrote:

I am not sure if this is just a GNOME issue or if my computer's
graphics (GMA 945) is just too slow. Whenever I plug into a display
via VGA (dual display) GNOME becomes very slow. Lowering the
resolution to 1024x768 (with mirror display) on both displays seems
to fix the issue. Could this be because my display (1400x1050) does
not scale well to higher resolutions like those with 16:9 and 16:10
aspect ratios?

Does anyone else experience slow downs when using external displays?
Maybe the GM4500HD in the newer thinkpads can handle this better.
Last time I used external displays I did. Under gnome and GDM I had
issues, but not under KDE.

I wonder if 3D acceleration has a role in that. Is 3D acceleration
deactivated when you plug a new monitor?

I didn't investigate because it worked well under KDE at the time.


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