https://bugzilla.kernel.org/show_bug.cgi?id=53391
Summary: nouveau: wrong display output order Product: Drivers Version: 2.5 Kernel Version: 3.8-rc6 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) AssignedTo: drivers_video-dri@kernel-bugs.osdl.org ReportedBy: stijn+bugs@linux-ipv6.be Regression: No
My graphics card is a Gainward GTX480 (http://www.gainward.com/main/vgapro.php?id=238). It has 2 DVI outputs, and 1 mini HDMI output. The DVI outputs are numbered on the card, with DVI 1 being the closest to the PCIe slot, then DVI 2, and finally the mini HDMI.
My primary (left) monitor, is connected to DVI 1, my secondary (right) monitor to DVI 2. When I boot the computer, the BIOS initializes and uses the monitor on DVI 1. Grub is displayed on the primary monitor, and the kernel initially outputs to the primary monitor as well.
However, as soon as the nouveau module is loaded, the primary monitor goes to standby and the kernel now uses the secondary monitor (on DVI 2) as primary. When X starts (no Xorg.conf file), it is also displayed on the secondary monitor.
When using either efifb, vesafb or uvesafb, the monitor on DVI 1 is always the primary monitor. X with nvidia.ko also uses DVI 1 as the primary display. Finally, when booting Windows, the startup screen is also displayed on the monitor connected to DVI 1.
Here comes the weird part: when I am in X, and run xrandr, it does show 3 connected devices: DVI-I-1, DVI-I-2, and HDMI-1, with DVI-I-2 being the only active one. So it seems that in X, the output order is correct, but with nouveaufb the DVI connectors are swapped.
I will attach the output of dmesg here. If anything else is needed, please let me know and I'll be happy to add it.