https://bugs.freedesktop.org/show_bug.cgi?id=51652

Bug #: 51652 Summary: [6550D SUMO] problems with secondar monitor on VGA, causing GPU lockups Classification: Unclassified Product: DRI Version: XOrg CVS Platform: x86-64 (AMD64) OS/Version: Linux (All) Status: NEW Severity: critical Priority: medium Component: DRM/Radeon AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: d.okias@gmail.com

Created attachment 63701 --> https://bugs.freedesktop.org/attachment.cgi?id=63701 dmesg_VGAonBootConnected.txt

1) when is computer booted with VGA connected, ends with repeatly restarting GPU

2) when is monitor connected on-fly in running Xorg, it seems fine (except small artifacts, i guess EXA, on screen mostly on top of DVI and bottom VGA trigerred by switching KDE virtual desktops). No errors in dmesg

3) when is DPMS activated and monitors suspends, back to online is returned only DVI

4) randomly I found: [drm:radeon_dp_link_train_cr] *ERROR* clock recovery reached max voltage [drm:radeon_dp_link_train_cr] *ERROR* clock recovery failed

5) out-topic, exist even only on DVI: when is enabled OGL KWIN and OpenGL video render, color of rendered context goes to white (every frame is whitier, until it's #ffffff)

No HDMI or DP conneted to system.

DVI-D: LG IPS235 1920x1080 VGA: ASUS VW224 1680x1050 Gentoo ~amd64 Kernel,libdrm,mesa,ddx: git, KMS

I'm able to test patches against anything.