[Bug 1623969] Re: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
Recently I encountered this problem and discovered a solution. I posted
my solution at:
kubuntu 16.04 SDDM login screen hangs
https://askubuntu.com/questions/765364/kubuntu-16-04-sddm-login-screen-hangs/874972#874972
For completeness sake, I will also repost the solution here.
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Recently I encountered this problem with kubuntu 16.04 SDDM login screen
hangs. The issue occurred after I installed kubuntu 16.04 on an Intel
i7-7700k with Intel 630 HD graphics and then updated to the latest
packages.
I was able to login using the workaround of using Ctrl+Alt+F1 to get to
a text console and then Ctrl+Alt+F7 to get back to X and the logged in
session.
I stumbled upon a fix to the login hang while I was working to get rid
of a screen tearing problem. The fix involves changing the compositor
rendering backend from XRender to OpenGL.
More specifically to address the hang on login and problem with screen
tearing I did the following:
FIX SCREEN TEARING AND LOGIN HANGING
A) Start K -> Settings -> System Settings
Under Hardware section
Double-click Display and Monitor
Choose Compositor on LHS
Enable compositor on startup: Checked # was checked
Rendering backend: OpenGL 3.1# was XRender
OpenGL interface: GLX
Tearing prevention ("vsync"): Full screen repaints # was Automatic
Ignore message "Full screen repaints" can cause performance problems.
Click Apply
REFERENCES:
Bug 321589 - Automatic VSync strategy causes tearing
https://bugs.kde.org/show_bug.cgi?id=321589
Screen Tearing on Kubuntu 16.04 with Intel Drivers?
https://askubuntu.com/questions/764302/screen-tearing-on-kubuntu-16-04-with-intel-drivers
B) Set KWIN variables.
Edit /etc/environment and add the top and bottom line:
__GL_YIELD="USLEEP"
#KWIN_TRIPLE_BUFFER=0
KWIN_USE_BUFFER_AGE=0
REFERENCES:
https://community.kde.org/KWin/Environment_Variables
https://askubuntu.com/questions/764302/screen-tearing-on-kubuntu-16-04-with-intel-drivers/774788
Listed as also working with NVidia.
I hope the above steps help others get rid of the login hang and screen tearing
problems.
** Bug watch added: KDE Bug Tracking System #321589
https://bugs.kde.org/show_bug.cgi?id=321589
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https://bugs.launchpad.net/bugs/1623969
Title:
Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
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[Bug 1623969] Re: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
Alan Robertson, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/comments/6 regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find. ** Changed in: xorg (Ubuntu) Status: Expired => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623969 Title: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1623969] Re: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
Please delete the words "needing to" from comment #8. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623969 Title: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1623969] Re: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
@moontan - that sounds like a completely different bug. This bug is a graphics driver bug, and yours appears to be something to do with needing to ecryptfs key management. I wasn't using ecryptfs at all. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623969 Title: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1623969] Re: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
I'm unsure if I understand the above but I have the same problem on a fresh install of kubuntu 16.04.1 and it occurred after I did a reboot just after changing my user password via the user manager in the system settings. Having switched to the tty1 command line from the frozen kde login I noticed that ecryptfs-mount-private still only accepted my old user password to unlock my home folder. When I changed the user password back to the original one, kde login worked again. Hopefully this observation helps. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623969 Title: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1623969] Re: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
Sorry I didn't update this, but somewhere along the line, the problem went away - after another set of updates. I'm not sure which one(s). But it is definitely working again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623969 Title: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1623969] Re: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
[Expired for xorg (Ubuntu) because there has been no activity for 60 days.] ** Changed in: xorg (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623969 Title: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1623969] Re: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
Alan Robertson, feel free to start with the oldest, and advise to the results. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623969 Title: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1623969] Re: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
Hi Christopher M. Penalver (@penalvch), I have tons of old kernels to choose from. What one would you like for me to try? Here are the choices: vmlinuz-3.19.0-28-generic vmlinuz-3.19.0-41-generic vmlinuz-4.2.0-36-generic vmlinuz-3.19.0-30-generic vmlinuz-3.19.0-42-generic vmlinuz-4.4.0-22-generic vmlinuz-3.19.0-31-generic vmlinuz-3.19.0-43-generic vmlinuz-4.4.0-24-generic vmlinuz-3.19.0-32-generic vmlinuz-3.19.0-47-generic vmlinuz-4.4.0-28-generic vmlinuz-3.19.0-33-generic vmlinuz-3.19.0-49-generic vmlinuz-4.4.0-31-generic vmlinuz-3.19.0-37-generic vmlinuz-3.19.0-51-generic vmlinuz-4.4.0-34-generic vmlinuz-3.19.0-39-generic vmlinuz-3.19.0-56-generic vmlinuz-4.4.0-36-generic By the way, I did try this before, and I think it worked, but I had trouble with USB devices afterwards (or so I remember). Since my mice are USB, that was a problem. So it would be helpful to me for you to suggest which kernel you would like for me to try... Something I forgot to say... When I remove all the .kde stuff and it boots up correctly (but crippled due to all my config missing), then the fifo underrun does _not_ occur. It occurs only once per login. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623969 Title: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1623969] Re: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass)
Alan Robertson, thank you for reporting this and helping make Ubuntu better. To clarify, if you boot into the kernel prior to the update, does this issue go away? ** Tags added: bios-outdated-2202 regression-update ** Changed in: xorg (Ubuntu) Importance: Undecided => Low ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1623969 Title: Cannot log in to kubuntu after update (Intel graphics + ksshaskpass) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1623969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
