My laptop is frequently hanging, KDE problem?

Hi,

Since yesterday, I am using Leap 42.2 with KDE Plasma version 5.8.3. My graphic card is:

00:02.0 VGA compatible controller: Intel Corporation Skylake Integrated Graphics (rev 07) (prog-if 00 [VGA controller])

And my processor is:

Intel(R) Core™ i7-6600U CPU @ 2.60GHz

For reasons that I don’t understand, it hangs now and then and I cannot do anything, i.e no shortcut keys or numlock works. The only solution is to manually power it off and on. I suspect that it might be a problem of KDE because right before hanging, the screen blinks and if I have an external monitor, I see a white screen. After that, the screen comes back but it hangs.

I was reading this thread https://forums.opensuse.org/showthread.php/511310-Frequent-system-crashes-Hangs which seems similar. I unchecked the “Enable compositor on Startup” but 10 minutes ago it hanged again. Does anybody know how to fix it or gather more information which can point to the real cause of this annoying behaviour?

you link you gave is for nvida problem? (intel graphics has sufficient problems of it own :slight_smile:

giving the output of grep -P “(L|Unl)oading” /var/log/Xorg.0.log might be useful (i.e the one not unloaded is the driver used)

ps use ctrl-alt-F1 if possible on next freeze, login, and type sudo poweroff

skylake processors have been a headache on the Linux kernel afaik there have been a lot of fixes in the 4.5 branch of the Kernal Leap uses 4.4
you should try using uxa acceleration as a general intel dirty fix
in /etc/X11/xorg.conf.d/20-intel.conf write


    Section "Device"
        Identifier  "Intel Graphics"
        Driver      "intel"
        Option      "AccelMethod"  "uxa"
    EndSection

but Skylake is newer then that bug, openSUSE backports fixes in the Linux kernel you coild try an updated kernel from
http://download.opensuse.org/repositories/Kernel:/openSUSE-42.2/standard/

zypper ar -f http://download.opensuse.org/repositories/Kernel:/openSUSE-42.2/standard/Kernel:openSUSE-42.2.repo
zypper dup --from http://download.opensuse.org/repositories/Kernel:/openSUSE-42.2/standard/

that repo has the 4.4.44 Kernel the update repo is still at 4.4.36
I’ve read somewhere that the 4.5+ branches have a lot of skylake fixes but afaik that’s not available from an official repo for LEAP only TW (you can get a newer kernel from user repo’s but I’m not sure which is stable enough)

FYI - im on skylake and TW is faultless using the modesetting driver (the kernel update suggested will also most likely give similar performance)
i asked for the xorg output since mine crashes with the intel driver. the uxa advise given might fix things (though i understand there is a further problem with dri?)

or maybe try Alt+SysReq+REISUB
( Magic SysRq key - Wikipedia )