https://bugzilla.kernel.org/show_bug.cgi?id=196341 Bug ID: 196341 Summary: Nouveau fails to use all external monitors on Thinkpad P51 with Nvidia Optimus (Nvidia Quadro M1200) Product: Drivers Version: 2.5 Kernel Version: 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u2 (2017-06-26) x86_64 GNU/Linux Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@xxxxxxxxxxxxxxxxxxxx Reporter: Evilandi666@xxxxxxxxx Regression: No Hi, im using a new Lenovo Thinkpad P51 that uses Nvidia Optimus. It has a integrated Intel graphic (Intel® HD Graphics 630) and a descrete Nvidia graphic (Nvidia Quadro M1200). The Thinkpad is used in combination with a Lenovo ThinkPad Workstation Dock (Docking Station). My OS is Debian Stretch (9). When using the proprietary Nvidia driver from the debian stretch repos, I can use two monitors on the docking station and the internal display. However, i can't rearrange them using xrandr. This only works when the integrated Intel GPU is deactivated in Bios. When using Nouveau however, I can only use one monitor connected to the docking station and the internal display. If the Bios is configured to use both graphic cards or only the discrete does not change anything. It seems that Nouveau only recognizes three monitors: One for the internal, one for all external connected the Thinkpad itself, one for all monitors connected to the dock. As a result, all monitors connected to the dock show the same (cloned), which is not changeable. The following commands were used to pass the external monitors to the discrete GPU: sudo xrandr --setprovideroffloadsink 1 0 sudo xrandr --setprovideroutputsource 1 0 Otherwise only the internal display works with Nouveau. It is not possibly to set the GPU to only use the internal intel GPU in BIOS. To summarize this up, more than one external monitor using a Lenovo Thinkpad P51 with a Dockingstation is only possible by using the proprietary nvidia driver. -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
