Hi, if you need me to file a bug report, then is that a correct place: https://bugs.freedesktop.org/ ? best regards Janek Kozicki > Hi, > > xrandr --output HDMI-1 --off --output DP-1 --mode 3840x2160 --pos 2160x0 --rotate left --output DVI-D-1 --off --output DP-2 --mode 3840x2160 --pos 0x0 --rotate left --output DP-3 --mode 3840x2160 --pos 4320x0 --rotate left > > The crash log is following: > > [ 963.513] (EE) > [ 963.513] (EE) Backtrace: > [ 963.513] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4a) [0x5566a8b8466a] > [ 963.513] (EE) 1: /usr/lib/xorg/Xorg (0x5566a89cb000+0x1bd3f9) [0x5566a8b883f9] > [ 963.513] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fc673b06000+0x110c0) [0x7fc673b170c0] > [ 963.513] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (0x7fc673767000+0x83f74) [0x7fc6737eaf74] > [ 963.513] (EE) 4: /usr/lib/xorg/modules/libshadow.so (shadowUpdatePacked+0x1da) [0x7fc6690dab7a] > [ 963.513] (EE) 5: /usr/lib/xorg/modules/drivers/modesetting_drv.so (0x7fc66f454000+0x8ecb) [0x7fc66f45cecb] > [ 963.513] (EE) 6: /usr/lib/xorg/modules/libshadow.so (0x7fc6690d8000+0x15a9) [0x7fc6690d95a9] > [ 963.513] (EE) 7: /usr/lib/xorg/modules/libshadow.so (0x7fc6690d8000+0x1624) [0x7fc6690d9624] > [ 963.513] (EE) 8: /usr/lib/xorg/modules/drivers/modesetting_drv.so (0x7fc66f454000+0xa113) [0x7fc66f45e113] > [ 963.513] (EE) 9: /usr/lib/xorg/modules/drivers/modesetting_drv.so (0x7fc66f454000+0xa3aa) [0x7fc66f45e3aa] > [ 963.513] (EE) 10: /usr/lib/xorg/Xorg (BlockHandler+0xb1) [0x5566a8a240d1] > [ 963.513] (EE) 11: /usr/lib/xorg/Xorg (WaitForSomething+0x141) [0x5566a8b81f01] > [ 963.513] (EE) 12: /usr/lib/xorg/Xorg (0x5566a89cb000+0x5445a) [0x5566a8a1f45a] > [ 963.513] (EE) 13: /usr/lib/xorg/Xorg (0x5566a89cb000+0x586a8) [0x5566a8a236a8] > [ 963.513] (EE) 14: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf1) [0x7fc6737872e1] > [ 963.513] (EE) 15: /usr/lib/xorg/Xorg (_start+0x2a) [0x5566a8a0d33a] > [ 963.513] (EE) > [ 963.513] (EE) Bus error at address 0x7fc6548a4000 > > Note: I installed package xserver-xorg-video-nouveau-dbg 1:1.0.13-3, > but this did not help in making above errors more informative. > > While in a working Xorg.0.log there is instead a message: > > [ 61.898] (II) modeset(0): Allocate new frame buffer 6480x3840 stride > [ 62.021] (II) modeset(0): Disabling kernel dirty updates, not required. > [ 224.753] (II) modeset(0): EDID vendor "DEL", prod id 53380 > [ 224.754] (II) modeset(0): Using EDID range info for horizontal sync > [ 224.754] (II) modeset(0): Using EDID range info for vertical refresh > [ 224.754] (II) modeset(0): Printing DDC gathered Modelines: > [ 224.754] (II) modeset(0): Modeline "3840x2160"x0.0 533.25 3840 3888 3920 4000 2160 2163 2168 2222 +hsync -vsync (133.3 kHz eP) > > > So evidently nouveau cannot allocate another framebuffer with size 6480x3840 _______________________________________________ Nouveau mailing list Nouveau@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/nouveau