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Old 03-30-2017, 05:23 PM   #1
mab
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Default screen updates one step behind user input on DisplayLink monitor

When using the modesetting driver, screen updates on the monitor connected to the DisplayLink adapter stay one step behind user input. For example, if I type a letter, it's not shown on the screen until I type a second letter or nudge the mouse.

Ubuntu recently made modesetting the default driver (without xorg.conf), so it took me a while to figure what changed to cause this problem, which I didn't have with earlier Ubuntu releases. The problem doesn't occur with the Intel driver, which I can force with this xorg.conf file:

Code:
Section "Device"
        Identifier "Intel"                                                                                                                  
        Driver "intel"                                                                                                                      
EndSection
Does anybody know what's going on or what to do about it?

Ubuntu 16.10
kernel 4.10.7-041007-generic
Dell XPS 13
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
Bus 004 Device 002: ID 17e9:4324 DisplayLink
monitor: Dell U27 13 HM
res: 2560x1440
displaylink-driver-1.3.52
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Old 04-04-2017, 10:09 PM   #2
johnhidey
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Default Same issue seen here

I'm seeing the same issue here. Not sure what information will help in solving the issue being that I'm pretty new to the linux world.

Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial

Kernel version: 4.10.8-041008-generic

System specs
8 GB RAM
256 GB SSD

If I can provide any more information please let me know what?

Thanks in advance
John
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Old 04-05-2017, 10:46 AM   #3
mlukaszek
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Default

Can you please record a video while this is happening? Also, please attach logs from your systems (see sticky post).

Thanks,
Michal
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Old 04-05-2017, 11:35 AM   #4
johnhidey
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I'll see if I do that tonight after work.
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Old 04-06-2017, 01:13 AM   #5
johnhidey
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So I got home and installed vokoscreen to record my screen and also install screenkey to display to you the keys I type so that you would see the lag/delay.

Funny thing is that when I run vokoscreen and have it capturing the external monitor the lag is gone. Hopefully this might help you. Works great as long as vokoscreen is recording, which I can't do during day to day work.

Is there anything else that I might be able to send you to help out. If you want some log files, can you point me to the directory that contains the logs you are interested in and I'll send attach them here

Sorry, no video, but I did try.

Forgot to add output of xrandr --current

Screen 0: minimum 320 x 200, current 4920 x 2000, maximum 8192 x 8192
eDP-1 connected 3000x2000+0+0 (normal left inverted right x axis y axis) 290mm x 190mm
3000x2000 59.99*+
2560x1600 59.99
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DVI-I-2-2 connected 1920x1080+3000+0 527mm x 296mm
1920x1080 60.00*+ 50.00 59.94
1680x1050 59.88
1280x1024 60.02
1440x900 59.90
1280x800 59.91
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 70.07 60.00
800x600 60.32 56.25
720x576 50.00
848x480 60.00
720x480 60.00 59.94
640x480 66.67 60.00 59.95 59.94
720x400 70.08
DVI-I-1-1 connected
1920x1080 60.00 + 50.00 59.94
1680x1050 59.88
1280x1024 60.02
1440x900 59.90
1280x800 59.91
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 70.07 60.00
800x600 60.32 56.25
720x576 50.00
848x480 60.00
720x480 60.00 59.94
640x480 66.67 60.00 59.95 59.94
720x400 70.08
1920x1080 (0x42) 148.500MHz +HSync +VSync
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.50KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.00Hz
1920x1080 (0x43) 148.500MHz +HSync +VSync
h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 56.25KHz
v: height 1080 start 1084 end 1089 total 1125 clock 50.00Hz
1920x1080 (0x44) 148.352MHz +HSync +VSync
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.43KHz
v: height 1080 start 1084 end 1089 total 1125 clock 59.94Hz
1680x1050 (0x45) 119.000MHz +HSync -VSync
h: width 1680 start 1728 end 1760 total 1840 skew 0 clock 64.67KHz
v: height 1050 start 1053 end 1059 total 1080 clock 59.88Hz
1280x1024 (0x46) 108.000MHz +HSync +VSync
h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 63.98KHz
v: height 1024 start 1025 end 1028 total 1066 clock 60.02Hz
1440x900 (0x47) 88.750MHz +HSync -VSync
h: width 1440 start 1488 end 1520 total 1600 skew 0 clock 55.47KHz
v: height 900 start 903 end 909 total 926 clock 59.90Hz
1280x800 (0x48) 71.000MHz +HSync -VSync
h: width 1280 start 1328 end 1360 total 1440 skew 0 clock 49.31KHz
v: height 800 start 803 end 809 total 823 clock 59.91Hz
1152x864 (0x49) 108.000MHz +HSync +VSync
h: width 1152 start 1216 end 1344 total 1600 skew 0 clock 67.50KHz
v: height 864 start 865 end 868 total 900 clock 75.00Hz
1280x720 (0x4a) 74.250MHz +HSync +VSync
h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 45.00KHz
v: height 720 start 725 end 730 total 750 clock 60.00Hz
1280x720 (0x4b) 74.250MHz +HSync +VSync
h: width 1280 start 1720 end 1760 total 1980 skew 0 clock 37.50KHz
v: height 720 start 725 end 730 total 750 clock 50.00Hz
1280x720 (0x4c) 74.176MHz +HSync +VSync
h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 44.96KHz
v: height 720 start 725 end 730 total 750 clock 59.94Hz
1024x768 (0x4d) 75.000MHz -HSync -VSync
h: width 1024 start 1048 end 1184 total 1328 skew 0 clock 56.48KHz
v: height 768 start 771 end 777 total 806 clock 70.07Hz
1024x768 (0x4e) 65.000MHz -HSync -VSync
h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.36KHz
v: height 768 start 771 end 777 total 806 clock 60.00Hz
800x600 (0x4f) 40.000MHz +HSync +VSync
h: width 800 start 840 end 968 total 1056 skew 0 clock 37.88KHz
v: height 600 start 601 end 605 total 628 clock 60.32Hz
800x600 (0x50) 36.000MHz +HSync +VSync
h: width 800 start 824 end 896 total 1024 skew 0 clock 35.16KHz
v: height 600 start 601 end 603 total 625 clock 56.25Hz
720x576 (0x51) 27.000MHz -HSync -VSync
h: width 720 start 732 end 796 total 864 skew 0 clock 31.25KHz
v: height 576 start 581 end 586 total 625 clock 50.00Hz
848x480 (0x52) 33.750MHz +HSync +VSync
h: width 848 start 864 end 976 total 1088 skew 0 clock 31.02KHz
v: height 480 start 486 end 494 total 517 clock 60.00Hz
720x480 (0x53) 27.027MHz -HSync -VSync
h: width 720 start 736 end 798 total 858 skew 0 clock 31.50KHz
v: height 480 start 489 end 495 total 525 clock 60.00Hz
720x480 (0x54) 27.000MHz -HSync -VSync
h: width 720 start 736 end 798 total 858 skew 0 clock 31.47KHz
v: height 480 start 489 end 495 total 525 clock 59.94Hz
640x480 (0x55) 30.240MHz -HSync -VSync
h: width 640 start 704 end 768 total 864 skew 0 clock 35.00KHz
v: height 480 start 483 end 486 total 525 clock 66.67Hz
640x480 (0x56) 25.200MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.50KHz
v: height 480 start 490 end 492 total 525 clock 60.00Hz
640x480 (0x57) 25.180MHz -HSync -VSync
h: width 640 start 648 end 744 total 800 skew 0 clock 31.48KHz
v: height 480 start 482 end 484 total 525 clock 59.95Hz
640x480 (0x58) 25.175MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.47KHz
v: height 480 start 490 end 492 total 525 clock 59.94Hz
720x400 (0x59) 28.320MHz -HSync +VSync
h: width 720 start 738 end 846 total 900 skew 0 clock 31.47KHz
v: height 400 start 412 end 414 total 449 clock 70.08Hz

Last edited by johnhidey; 04-06-2017 at 01:16 AM.
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Old 04-07-2017, 07:07 PM   #6
mab
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The top thread in the forum has a link to a tool you can use to collect logs.
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Old 04-08-2017, 04:05 PM   #7
johnhidey
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Here are the logs
Attached Files
File Type: zip polynesian-l_2017-04-08T11:02:22.389703.zip (230.8 KB, 1 views)
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Old 04-17-2017, 11:34 PM   #8
johnhidey
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Any update on this issue? Would really like to get back to using my multi monitor setup instead of having to use my laptop screen while at home.
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