Hi,
On 05-09-18 20:35, Daniel Stone wrote:
Hi Hans,
On Wed, 5 Sep 2018 at 19:23, Hans de Goede <hdego...@redhat.com> wrote:
Under Fedora 29 (xserver-1.20) the transition from GDM to
the GNOME3 session is no longer smooth, it seems that the
screen is cleared to black when the Xserver starts instead
of inheriting the framebuffer contents from GDM as before.
Changing the DDX driver from modesetting to intel fixes this,
I think this may be caused by the new atomic support in the
modesetting driver.
It's caused by support for modifiers: this allows Mesa to use a
multi-planar framebuffer (auxiliary compression plane), which the new
X server can't then read back from because drmModeGetFB only supports
a single plane.
I do not think that that is the problem in my case. I'm seeing this
when transitioning from a GDM greeter session which is GNOME shell
as Wayland compositor to a GNOME3 on Xorg user session.
And replacing the DDX driver in the *user* session with the intel
ddx fixes this. So I think this is another issue.
Regards,
Hans
_______________________________________________
xorg-devel@lists.x.org: X.Org development
Archives: http://lists.x.org/archives/xorg-devel
Info: https://lists.x.org/mailman/listinfo/xorg-devel
