Created attachment 120460 [details] dmesg.log ==Regresion== -------------------------------------------------- Not sure ==Bug detailed description== -------------------------------------------------- Unable to login with 3 monitors connected on ubuntu 15.10 x64 ==Attachments== -------------------------------------------------- dmesg.log Xorg.log ==Steps to reproduce== -------------------------------------------------- Start the system with 3 monitors connected to the system and try to login ==Actual results== -------------------------------------------------- Unable to login with 3 monitors connected ==Expected results== ------------------------------------------------ Ubuntu must be able to login with 3 monitors connected to the system ==Additional information== ------------------------------------------------ Ubuntu only allows login with 2 monitors connected to the system --- Hardware information --- Motherboard model : Skylake Client platform Motherboard type : Skylake Y LPDDR3 RVP3 Laptop Motherboard manufacturer : Intel Corporation CPU information : Intel(R) Core(TM) m5-6Y57 CPU @ 1.10GHz GPU Card : Intel Corporation Sky Lake Integrated Graphics (rev 07) (prog-if 00 [VGA controller]) KSC : 1.15 Linux distribution: Ubuntu 15.10 LTS 64 bits Kernel: 4.3 mainline from https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/?id=refs/tags/v4.3 Bios SKL: SKLSE2R1.R00.B104.B01.1511110114) xorg-server-1.18.0 from http://cgit.freedesktop.org/xorg/xserver libdrm-2.4.65 from http://cgit.freedesktop.org/mesa/drm/ xf86-video-intel 2.99.917 from http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/ mesa-11.0.4 from http://cgit.freedesktop.org/mesa/mesa/ libva-1.6.2.pre1 from http://cgit.freedesktop.org/libva/ vaapi-intel-driver 1.6.2.pre1 from http://cgit.freedesktop.org/vaapi/intel-driver cairo 1.14.4 from http://cgit.freedesktop.org/cairo Rendercheck 1.5 from http://cgit.freedesktop.org/xorg/app/rendercheck SKL-Y : DMC 1.23 and GUC 4.3 firmware from https://01.org/linuxgraphics/intel-linux-graphics-firmwares IGT 1.13: http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/commit/?id=2db78a4995a8ee298ae0cd68879baf80407a0e5e
Created attachment 120461 [details] Xorg.log
This isn't a Mesa (3D) bug. Display is handled by the Linux Kernel. If you'd like to pursue this with the kernel team, you can change this to Product: DRI Component: DRM/Intel Or, if you'd rather not, we can close this as RESOLVED / NOTOURBUG. There are some restrictions on triple monitor support; my guess is that you've hit some unsupported configuration. It might be worth talking to someone to confirm before assuming it's a bug.
Change this bug to kernel team Product: DRI Component: DRM/Intel
(In reply to Kenneth Graunke from comment #2) > This isn't a Mesa (3D) bug. Display is handled by the Linux Kernel. The display is wider than Mesa can handle though - it currently has a 8192 cap on textures and framebuffers, which is not enough for this setup.
Humberto, it sounds like we have several WARN_ON(!wm_changed). So please update your system, verify that you are respecting your system spec, then re-test and update the bug accordingly
Re-tested : with last drm-intel-nightly kernel this issue is fixed commit 29cc77ba9ad204023af36bcfd6580a601b91791e Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Thu May 19 17:59:46 2016 +0100 drm-intel-nightly: 2016y-05m-19d-16h-59m-17s UTC integration manifest
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