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 > >> >> 0x06 > >> >> > >> >> before 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 = ffff880037072400 > >> > > >> > trying 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 amd64 > >> > > >> > the 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 [1] http://www.asus.com/Motherboards/AMD_AM2/M2AVM/
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