[CentOS] Strangeness on X11 screen capture

Thu Apr 16 20:16:45 UTC 2020
Jerry Geis <jerry.geis at gmail.com>

Hi all,

I am running CentOS 7 on a NUC5CPYB. Intel video:
00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium
Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller (rev 35)


When I take a screen shot I get "different" things.
I use:
export DISPLAY=:0.0
/usr/bin/xwd -silent -root -out screen; convert screen screen.png

I tried import also for the screen capture and its the same random images.

Granted the images are all things I have showing previously - but most
times its not what is showing now.

I have verified the Intel driver is loaded:
[    19.009] (II) LoadModule: "intel"
[    19.010] (II) Loading /usr/lib64/xorg/modules/drivers/intel_drv.so
[    19.012] (II) Module intel: vendor="X.Org Foundation"
[    19.012]    compiled for 1.20.1, module version = 2.99.917
[    19.012]    Module class: X.Org Video Driver
[    19.012]    ABI class: X.Org Video Driver, version 24.0
[    19.012] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:
        i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G,
        915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM,
        Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35,
Q33,
        GM45, 4 Series, G45/G43, Q45/Q43, G41, B43
[    19.015] (II) intel: Driver for Intel(R) HD Graphics
[    19.015] (II) intel: Driver for Intel(R) Iris(TM) Graphics
[    19.015] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics
[    19.015] (++) using VT number 1

[    19.016] (II) intel(0): Using Kernel Mode Setting driver: i915, version
1.6.0 20181204
[    19.018] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD
Graphics
[    19.019] (--) intel(0): CPU: x86-64, sse2, sse3, ssse3, sse4.1, sse4.2;
using a maximum of 2 threads
[    19.019] (II) intel(0): Creating default Display subsection in Screen
section
        "Default Screen Section" for depth/fbbpp 24/32
[    19.019] (==) intel(0): Depth 24, (--) framebuffer bpp 32
[    19.019] (==) intel(0): RGB weight 888
[    19.019] (==) intel(0): Default visual is TrueColor
[    19.023] (II) intel(0): Output DP1 has no monitor section
[    19.024] (II) intel(0): Enabled output DP1
[    19.024] (II) intel(0): Output HDMI1 has no monitor section
[    19.025] (II) intel(0): Enabled output HDMI1
[    19.025] (II) intel(0): Output DP2 has no monitor section
[    19.026] (II) intel(0): Enabled output DP2
[    19.026] (II) intel(0): Output HDMI2 has no monitor section
[    19.027] (II) intel(0): Enabled output HDMI2
[    19.027] (--) intel(0): Using a maximum size of 256x256 for hardware
cursors
[    19.027] (II) intel(0): Output VIRTUAL1 has no monitor section
[    19.027] (II) intel(0): Enabled output VIRTUAL1
[    19.028] (--) intel(0): Output HDMI2 using initial mode 1920x1080 on
pipe 2

What can be doing this ? How do I track it down?
Thanks,

Jerry