Dual monitor setup does not initialize
Submitted by Adam Reichold @adamreichold
Assigned to Default DRI bug account
Description
Created attachment 113508
journalctl -b | grep "[drm"
I am running Arch Linux on an AMD A6-3500 with Radeon HD 6530D graphics on an Gigabyte A55M-S2V mainboard. I just received updated X server to version 1.17.1 together with a rebuilt version 7.5.0 of the XFree86 ATI driver with the kernel staying at 3.18.6.
I do have two Samsung monitors connected to the system, one via DVI and one via VGA. This setup always initialized unreliably and I had to manually add modes for the VGA-connected monitor using
xrandr --newmode "1680x1050_60.00" 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync
xrandr --addmode VGA-0 "1680x1050_60.00"
xrandr --output VGA-0 --mode "1680x1050_60.00"
for it to work at all. But after the update described above, the two monitors never initialize properly anymore. Before the update, I sometimes had to power-cycle (meaning switch off power not just a reboot) but it did eventually work after two or three tries.
The reason I am reporting this as a Radeon DRM issue instead of an X server problem is that my system log contains errors from the DRM driver about "channel eq" and "clock recovery". I attached those logs grepped for "[drm".
Thank for your help and please tell me if I can provide any further information to help diagnose this.
Attachment 113508, "journalctl -b | grep "[drm"":
drm-1.log