[Bug 1492778] Re: kde crashes when turning powering on display port monitor
It affects me too with Intel NUC 5i5RYH.I have a WORKAROUND (read till the end of this post). I have it plugged to a TV by HDMI. Everytime the TV is switched off, X crashes with libqxcb.so errors in syslog, though the problem is not in libqxcb.so. The problem is that xrandr looses all screen displays!! Nasty stuff. I found out about that by compiling a custom libqxcb and writing log messages to a file. This did not happen in 14.04. Of course it won't affect laptops because they have always at least one display connected. It also doesn't affect most desktop monitors, because when they are in standby, they don't signal that they are off in the HDMI cable signals. (pin 19). It only affects computers on which all of their monitors or TVs get turned off without turning the computer off, and those monitors or TVs assert HDMI pin 19. My TV isn't even off, it is in standby and it asserts pin 19, which crashes linux. Please look for HDMI PIN 19 (Hot plug detect) in the web for more information. It has caused problems in windows too in the past. I have a nasty quick and dirty WORKAROUND: Every time I reboot it or switch it on, I wait for X to start on the TV I have to: 1) Wait for the UI to start. Login. 2) In a console in the UI (such as konsole, yakuake, etc.), run this: xrandr --output VIRTUAL1 --mode 1920x1080 --same-as HDMI1 xrandr --addmode VIRTUAL1 1920x1080 xrandr --output HDMI1 --primary 3) Now, if you run: xrandr you'll see that there is an additional display called VIRTUAL1 I tried and failed to make this sequence of commands automatic upon login in. Something about the timing about which they have to be run, when the full desktop has already been loaded I guess. Please someone let me know if these xrandr commands can be made automatic. I'm getting "cranky" about having to run them every time the HTPC has to reboot or looses power and switch it on again. Cheers!! --Juan Manuel Cabo -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kubuntu-meta in Ubuntu. https://bugs.launchpad.net/bugs/1492778 Title: kde crashes when turning powering on display port monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kubuntu-meta/+bug/1492778/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 1492778] Re: kde crashes when turning powering on display port monitor
I mean, It is mind boggling because the main reason I got an Intel NUC was to pair it with a TV.. but it turns out that linux crashes when the TV goes to standby or OFF mode. OR HDMI gets unplugged. I think the nvidia driver always makes sure that there is always at least one virtual or mock screen so that libraries don't crash. I think. Cheers! --Juan Manuel Cabo -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kubuntu-meta in Ubuntu. https://bugs.launchpad.net/bugs/1492778 Title: kde crashes when turning powering on display port monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kubuntu-meta/+bug/1492778/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 1492778] Re: kde crashes when turning powering on display port monitor
I'm having the same problem on an up to date 15.10. Only I cannot log back in because there's no display manager present. I can switch to a virtual console and there it works. But when I get back to Console #7 the display goes into power saving mode. The only trace from the crash is in dmesg: kactivitymanage[1629]: segfault at 18 ip 7f4cf6438e90 sp 7ffead511e28 error 4 in libqxcb.so[7f4cf640a000+b5000] krunner[2159]: segfault at 18 ip 7f3523ebede8 sp 7ffeb62663c0 error 4 in libqxcb.so[7f3523e75000+b5000] kwin_x11[2164]: segfault at 18 ip 7f6e63b14de8 sp 7fff87859850 error 4 in libqxcb.so[7f6e63acb000+b5000] plasmashell[2167]: segfault at 18 ip 7f192ad04de8 sp 7ffc222dd470 error 4 in libqxcb.so[7f192acbb000+b5000] klauncher[2176]: segfault at 18 ip 7fb52e3abde8 sp 7ffda395b150 error 4 in libqxcb.so[7fb52e362000+b5000] Over DVI it works fine - I can switch my display off and on again without problems. I have a Z87 MB with Pentium G3258 using the integrated graphics of the CPU. -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kubuntu-meta in Ubuntu. https://bugs.launchpad.net/bugs/1492778 Title: kde crashes when turning powering on display port monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kubuntu-meta/+bug/1492778/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 1492778] Re: kde crashes when turning powering on display port monitor
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: kubuntu-meta (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kubuntu-meta in Ubuntu. https://bugs.launchpad.net/bugs/1492778 Title: kde crashes when turning powering on display port monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kubuntu-meta/+bug/1492778/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 1492778] Re: kde crashes when turning powering on display port monitor
I've activated kubuntu-backports and I'm now running a fully updated system (KDE 5.3). The problem still persists. I don't get the login screen if I turn off the monitor and then immediately on again. However, if I turn off the monitor when I go to bed and then turn on it again in the morning, my session is killed and I get the login screen. So, the crash actually happens when you turn on the monitor, not when you turn it off. Please let me know what more information is required to troubleshoot this. -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kubuntu-meta in Ubuntu. https://bugs.launchpad.net/bugs/1492778 Title: kde crashes when turning powering on display port monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kubuntu-meta/+bug/1492778/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
