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#1 2019-10-02 07:50:06

xhpohanka
Member
Registered: 2014-10-21
Posts: 17

ThinkPad laptop xorg lagging with external monitor attached

Hi,
I have Arch linux installation on Lenovo T460p (i7-6700HQ, 16GB RAM), lightdm, Cinnamon, dicreete nvidia card used only for CUDA, Xorg running using Intel graphics.
I'm facing unpleasant lagging of my system, it happens around twice a minute and while typing it very often ends with doubling letters.

When I start my laptop (does not matter if with external monitor connected or not) everything usually works fine. When I put the laptop into sleep and then wake it up the problem arises.
I found that when lagging, my xorg.log is spammed by following messages from modeset and sometimes with info about some input events lost. Interesting is that this modeset messages are there each 31 seconds so I guess that there is some timeout in driver or anywhere.

[ 86554.724] (II) modeset(0): EDID vendor "DEL", prod id 41070
[ 86554.724] (II) modeset(0): Using hsync ranges from config file
[ 86554.724] (II) modeset(0): Using vrefresh ranges from config file
[ 86554.724] (II) modeset(0): Printing DDC gathered Modelines:
[ 86554.724] (II) modeset(0): Modeline "1920x1080"x0.0  148.50  1920 2008 2052 2200  1080 1084 1089 1125 +hsync +vsync (67.5 kHz eP)
[ 86554.724] (II) modeset(0): Modeline "800x600"x0.0   40.00  800 840 968 1056  600 601 605 628 +hsync +vsync (37.9 kHz e)
[ 86554.724] (II) modeset(0): Modeline "640x480"x0.0   31.50  640 656 720 840  480 481 484 500 -hsync -vsync (37.5 kHz e)
[ 86554.724] (II) modeset(0): Modeline "640x480"x0.0   25.18  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz e)
[ 86554.724] (II) modeset(0): Modeline "720x400"x0.0   28.32  720 738 846 900  400 412 414 449 -hsync +vsync (31.5 kHz e)
[ 86554.724] (II) modeset(0): Modeline "1280x1024"x0.0  135.00  1280 1296 1440 1688  1024 1025 1028 1066 +hsync +vsync (80.0 kHz e)
[ 86554.724] (II) modeset(0): Modeline "1024x768"x0.0   78.75  1024 1040 1136 1312  768 769 772 800 +hsync +vsync (60.0 kHz e)
[ 86554.724] (II) modeset(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz e)
[ 86554.724] (II) modeset(0): Modeline "800x600"x0.0   49.50  800 816 896 1056  600 601 604 625 +hsync +vsync (46.9 kHz e)
[ 86554.724] (II) modeset(0): Modeline "1152x864"x0.0  108.00  1152 1216 1344 1600  864 865 868 900 +hsync +vsync (67.5 kHz e)
[ 86554.724] (II) modeset(0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440 1688  1024 1025 1028 1066 +hsync +vsync (64.0 kHz e)
[ 86554.729] (II) event23 - Logitech M705: SYN_DROPPED event - some input events have been lost.
[ 86585.728] (II) modeset(0): EDID vendor "DEL", prod id 41070
[ 86585.728] (II) modeset(0): Using hsync ranges from config file
[ 86585.728] (II) modeset(0): Using vrefresh ranges from config file
[ 86585.728] (II) modeset(0): Printing DDC gathered Modelines:
[ 86585.728] (II) modeset(0): Modeline "1920x1080"x0.0  148.50  1920 2008 2052 2200  1080 1084 1089 1125 +hsync +vsync (67.5 kHz eP)
[ 86585.728] (II) modeset(0): Modeline "800x600"x0.0   40.00  800 840 968 1056  600 601 605 628 +hsync +vsync (37.9 kHz e)
[ 86585.728] (II) modeset(0): Modeline "640x480"x0.0   31.50  640 656 720 840  480 481 484 500 -hsync -vsync (37.5 kHz e)
[ 86585.728] (II) modeset(0): Modeline "640x480"x0.0   25.18  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz e)
[ 86585.728] (II) modeset(0): Modeline "720x400"x0.0   28.32  720 738 846 900  400 412 414 449 -hsync +vsync (31.5 kHz e)
[ 86585.728] (II) modeset(0): Modeline "1280x1024"x0.0  135.00  1280 1296 1440 1688  1024 1025 1028 1066 +hsync +vsync (80.0 kHz e)
[ 86585.728] (II) modeset(0): Modeline "1024x768"x0.0   78.75  1024 1040 1136 1312  768 769 772 800 +hsync +vsync (60.0 kHz e)
[ 86585.728] (II) modeset(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz e)
[ 86585.728] (II) modeset(0): Modeline "800x600"x0.0   49.50  800 816 896 1056  600 601 604 625 +hsync +vsync (46.9 kHz e)
[ 86585.728] (II) modeset(0): Modeline "1152x864"x0.0  108.00  1152 1216 1344 1600  864 865 868 900 +hsync +vsync (67.5 kHz e)
[ 86585.728] (II) modeset(0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440 1688  1024 1025 1028 1066 +hsync +vsync (64.0 kHz e)

Can someone give any advice how to solve it?

cat /etc/X11/xorg.conf.d/20-intel.conf 
Section "Device"
  Identifier  "Intel Graphics"
  Driver      "intel"
EndSection

best regards
Jan

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