I have made a fresh Kubuntu 14.04 installation with KDE version 4.13.0. After going to standby and resuming, the desktop freezes. The mouse pointer is reacting for about 20 seconds, then freezes, too. After some more seconds, the whole desktop crashes and brings me to the login menu. After logging in, KDE freezes again (an later crashes) while seeing the first icon of the standard start screen animation. (This happens with lock-screen option enabled and disabled.) Only restarting my machine helps to login succesfully. I did never come across this problem with Kubuntu 12.04 and KDE 4.8.4. My hardware did not change in any way. Reproducible: Always Steps to Reproduce: 1. Going to standby 2. resuming from standby Actual Results: desktop freezes, then craches and brings me to the login menu. Outout of "sudo dmidecode -t 2" # dmidecode 2.12 SMBIOS 2.6 present. Handle 0x0002, DMI type 2, 15 bytes Base Board Information Manufacturer: ASUSTeK Computer INC. Product Name: M4A87TD EVO Version: Rev 1.xx Serial Number: MT7009028401368 Asset Tag: To Be Filled By O.E.M. Features: Board is a hosting board Board is replaceable Location In Chassis: To Be Filled By O.E.M. Chassis Handle: 0x0003 Type: Motherboard Contained Object Handles: 0
If you get the login screen again, this means the X server crashed. Could you please check the tail of /var/log/Xorg.0.log.old if you see any traces of an X server crash?
Created attachment 86290 [details] Xorg log file after crash The last line says: (EE) Server terminated successfully (0). Closing log file.
I have to mention that I am using the default NOUVEAU driver now instead of the proprietary nvidia driver which I used before.
There is no indication of a crash in the log from comment #2. Does this also happen with a freshly created user account? It could be caused by some setting files.
My installation is just one week old. Albeit, I created a fully fresh user account and ran into exactly the same issue.
What else can I do?
Try isolating what component is responsible: Try using KDE 4.13 with X.org drivers and kernel from Kubuntu 12.04. Try reproducing with a different desktop environment. If it works there, try not using compositing with KWin, or using just XRender compositing. I am pretty sure KDE itself cannot freeze the mouse, it has to be an X11 or driver problem, maybe only triggered by using OpenGL type compositing.
Thank you Cristoph! I switched the compositing type to XRender and the problem is gone. To whom shall I relay this bug?
No idea, let's ask KWin maintainers.
The Nouveau 3D Drivers The 3D drivers of the Nouveau driver suite are in Mesa. All the drivers are in a state to allow to play some games, more or less. You can try them at your own discretion, and some distributions even package them. When you encounter problems with them, read below, whether bug reports are valued or accepted, please. InstallNouveau explains the installation process. While the drivers include a significant amount of functionality and probably work on the common Linux games shipped with distributions, there are still some serious issues and they are not too optimized for performance. OpenGL applications that work at first may crash sooner or later. Some applications may crash X itself or hang the GPU. You should be prepared to face issues, and be able to recover from them yourself. If the GPU hangs, you can either reboot or suspend (see LockupRecovery). ------ http://nouveau.freedesktop.org/wiki/MesaDrivers/ ------- X server ouse freeze / crash are X bugs, in particular (very likely) the nouveau driver. You can ---------- * try the nvidia blob again * stay with xrender compositing * try to suspend compositing (Shift+Alt+F12) before going to STR (and resume it w/ the same shortcut afterwards)