Am Donnerstag, den 18.10.2012, 18:14 -0400 schrieb Alex Deucher:
On Wed, Oct 17, 2012 at 4:48 PM, Paul Menzel wrote:
Am Mittwoch, den 17.10.2012, 16:25 -0400 schrieb Alex Deucher:
On Wed, Oct 17, 2012 at 11:26 AM, Paul Menzel wrote:
Am Mittwoch, den 17.10.2012, 16:49 +0200 schrieb Paul Menzel:
setting up an ASUS M2A-VM after some months with
[ 3.178337] [drm] initializing kernel modesetting (RS690 0x1002:0x791E 0x1043:0x826D).logging in into GNOME Shell (GNOME 3) or for testing with Ubuntu 12.04 and Unity, the image flickers for a second and then works normally.
Turning on debugging
/sys/module/drm/parameters$ echo "0x06" | sudo tee debug sudo: unable to resolve host granit 0x06before logging in, the following is logged. Looking at the source code, I do not see that this is supposed to be a problem. But maybe you can figure out more.
[ 454.896408] [drm:drm_mode_addfb], [FB:41] [ 454.896427] [drm:radeon_crtc_page_flip], flip-ioctl() cur_fbo = ffff880072438400, cur_bbo = ffff880037072400trying Linux 3.5
$ dpkg -l linux-image-3.5* | grep ii | tr -s ' ' | cut -d ' ' -f 2-4 linux-image-3.5-trunk-amd64 3.5.5-1~experimental.1 amd64the flickering is still there.
I don't see anything wrong in the log. Does the flicker occur at regular intervals or just at start up?
As far as I see, one second after hitting enter in the graphical login manager (LightDM in this case).
I suspect the flicker may be due to your desktop environment probing for monitors at startup
Hmm. Only a VGA monitor is detected and I do not see that issue on different system where I tested GNOME Shell to reproduce this. I have test Unity too again.
Depends on the system and what connectors they have and whether or not they support load detection.
Is there a way to find out? This is an ASUS M2A-VM [1] with a VGA and DVI connector.
Though the probing should be in the logs somehow? But there are not during the time of login.
which causes a flicker if nothing is attached to the analog ports (VGA, s-video) as that results in a load detection operation to probe for old monitors without EDIDs or analog TVs.
Any hint on how to rule that out? Disable some outputs on the command line or so?
Depending on what is doing the probing you could try starting bare X without a desktop environment. Or disable the analog outputs you aren't using in your xorg.conf. E.g.,
Section "Monitor" Identifier "S-video" Option "Disable" "true" EndSection
I added that to the new file `/etc/X11/xorg.conf.d/99-disable.conf` also disabling HDMI-0 and DVI-0. Nothing changed though after restarting the graphical login manager (logging out and back in).
Thanks,
Paul