Setup: - kubuntu 17.10; - kernel v4.13.0-25-generic; - plasma v5.11.5; - QT: 5.9.1; - video card NVIDIA GTX 1080Ti; - video driver: nouveau (v1.0.15-2); - primary monitor: BENQ connected through DisplayPort; - secondary monitor (smaller resolution): LG connected through HDMI->VGA converter; - secondary monitor is on the left of primary monitor; Problem: - if I turn off primary monitor when logged in then xorg crashes and login screen appears; - if I turn on primary monitor after log on then xorg crashes and login screen appears; After xorg crash I still can see picture (login screen) on secondary monitor. Entries from kernel log (several crashes after I played with power button of primary monitor): 2018-01-19 10:21 usb 1-6 USB disconnect, device number 2 2018-01-19 10:21 nouveau 0000 6:00.0: disp: 0x00006541[0]: INIT_GENERIC_CONDITON: unknown 0x07 2018-01-19 10:21 show_signal_msg 10 callbacks suppressed 2018-01-19 10:21 kscreen_backend[1444]: segfault at 10 ip 00007ff3a9466968 sp 00007ffe1faae640 error 4 in KSC_XRandR.so[7ff3a944e000+21000] 2018-01-19 10:21 nouveau 0000 6:00.0: gr: FECS falcon already acquired by gr! 2018-01-19 10:21 nouveau 0000 6:00.0: gr: init failed, -16 2018-01-19 10:21 usb 1-6 new high-speed USB device number 3 using xhci_hcd 2018-01-19 10:21 usb 1-6 New USB device found, idVendor=05e3, idProduct=0608 2018-01-19 10:21 usb 1-6 New USB device strings: Mfr=0, Product=1, SerialNumber=0 2018-01-19 10:21 usb 1-6 Product: USB2.0 Hub 2018-01-19 10:21 hub 1-6 .0: USB hub found 2018-01-19 10:21 hub 1-6 .0: 4 ports detected 2018-01-19 10:22 kscreen_backend[3140]: segfault at 14 ip 00007f207d87ebb2 sp 00007ffd44f5efa0 error 4 in KSC_XRandR.so[7f207d86a000+21000] 2018-01-19 10:22 nouveau 0000 6:00.0: gr: FECS falcon already acquired by gr! 2018-01-19 10:22 nouveau 0000 6:00.0: gr: init failed, -16 2018-01-19 10:22 usb 1-6 USB disconnect, device number 3 2018-01-19 10:22 nouveau 0000 6:00.0: disp: 0x00006541[0]: INIT_GENERIC_CONDITON: unknown 0x07 2018-01-19 10:22 kscreen_backend[3455]: segfault at 10 ip 00007fb6d7df6968 sp 00007ffd1dd2c7c0 error 4 in KSC_XRandR.so[7fb6d7dde000+21000] 2018-01-19 10:22 nouveau 0000 6:00.0: gr: FECS falcon already acquired by gr! 2018-01-19 10:22 nouveau 0000 6:00.0: gr: init failed, -16 2018-01-19 10:23 usb 1-6 new high-speed USB device number 4 using xhci_hcd 2018-01-19 10:23 usb 1-6 New USB device found, idVendor=05e3, idProduct=0608 2018-01-19 10:23 usb 1-6 New USB device strings: Mfr=0, Product=1, SerialNumber=0 2018-01-19 10:23 usb 1-6 Product: USB2.0 Hub 2018-01-19 10:23 hub 1-6 .0: USB hub found 2018-01-19 10:23 hub 1-6 .0: 4 ports detected 2018-01-19 10:23 kscreen_backend[4005]: segfault at 14 ip 00007f9292aafbb2 sp 00007fffa169f410 error 4 in KSC_XRandR.so[7f9292a9b000+21000] 2018-01-19 10:23 nouveau 0000 6:00.0: gr: FECS falcon already acquired by gr! 2018-01-19 10:23 nouveau 0000 6:00.0: gr: init failed, -16 2018-01-19 10:23 nouveau 0000 6:00.0: gr: init failed, -16
Created attachment 136844 [details] xorg log for comment no. 2
Hmmm.. I cannot reproduce previous behavior. Now it behaves differently: - if I turn off primary monitor when I logged in then all windows and taskbar jumps in to secondary monitor (acts like primary?) which still displays picture; - if I turn on primary monitor then all windows and taskbar still remains in secondary monitor; primary monitor displays "mo signal" and goes power save. Attaching xorg and kernel logs. P.S. during testing I gought situation when after boot up picture in primary monitor rapidly changes between login screen and black screen.
Created attachment 136845 [details] kern log for comment no. 2
I reproduced xorg crash (as in description) again. I think key is that secondary monitor was turned off (power save mode like: cable connected but power button blinking) during boot up. Then I turned off primary display (crash), then logged in and turned on primary display (crash), then again logged in. Attached kernel log and both xorg logs.
Created attachment 136854 [details] kernel log for comment no. 4
Created attachment 136855 [details] xorg log for comment no. 4
Created attachment 136856 [details] old xorg log for comment no. 4
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