https://bugs.kde.org/show_bug.cgi?id=389193
Bug ID: 389193
Summary: KDE crashes and ksceen_backend segfault when monitor
is turned off or turned on
Product: KScreen
Version: 5.11.5
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: common
Assignee: se...@kde.org
Reporter: zmo...@hotmail.com
Target Milestone: ---
Setup:
- kubuntu 17.10;
- 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 KDE crashes and login
screen appears;
- if I turn on primary monitor after log on then KDE crashes and login screen
appears;
After KDE 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
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