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<font size="+2" face="Liberation Sans">For the curious, I have
resolved the situation for now by removing the nvidia drivers and
also blacklisting nouveau. This leaves only the intel i915 driver
using the integrated intel graphics (HD4600). So the nvidia GT
730M is unused.</font><font size="+2" face="Liberation Sans">
This notebook uses Optimus technology, meaning the nvidia card
cannot be used independently of the intel integrated GPU.</font><font
size="+2" face="Liberation Sans"> I am hoping that using only the
intel GPU will give acceptable screen quality. For this Thinkpad
T440p, the nvidia-driver should probably be nvidia-legacy390,
built with GLVND="no" and also use the "pass-through" xorg
settings from
<a class="moz-txt-link-freetext" href="http://us.download.nvidia.com/XFree86/Linux-x86_64/390.132/README/randr14.html">http://us.download.nvidia.com/XFree86/Linux-x86_64/390.132/README/randr14.html</a>.
I think my issues were caused by the nvidia OpenGL replacement
libraries not working with Qt5.</font><br>
<br>
<div class="moz-cite-prefix">On 3/22/20 1:16 PM, Kevin McCormick
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:e5171e72-97f4-06dc-005b-c36197f6a447@fastmail.fm">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<font size="+2" face="Liberation Sans">Further information:
removed the nvidia-kernel and nvidia-driver packages</font><font
size="+2" face="Liberation Sans"><font face="Liberation Sans">
(440.59) and xf86-video-nouveau-blacklist package. Now
zoom-linux and kde seem to run fine. Problem is display
quality is far lower than when nvidia was installed.
Apparently, xorg was unloading nvidia and loading nouveau
regardless of blacklist, shown in Xorg.0.log, but the nvidia
libraries are so much better. When I used
/etc/X11/xorg.conf.d/10-nvidia.conf there was a crash with X
regardless of window manager, so the issue is plainly using
the wrong nvidia driver. When I tried to manually use the
NVIDIA-Linux***.run program, it claimed there was a kernel
module present, so I halted at that point. The nvidia README
lists possible library conflicts, which is a problem for me.
How does one package the 418.1130 driver and is nvidia-switch
necessary?</font></font><br>
<br>
<div class="moz-cite-prefix">On 3/22/20 7:58 AM, Kevin McCormick
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:5c957f7a-03ef-be69-eb87-bbe6e359c7a5@fastmail.fm">
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<font size="+2" face="Liberation Sans">I should also add that
kde will not start. The splash screen appears, but then
crashes to a black screen with the cursor in the upper left
and no keyboard or mouse response. Computer must be powered
off by pressing the power button for 4 sec. I tried "export
KDE_DEBUG=True" but cannot find a dump file. Using fluxbox is
fine.</font><br>
<br>
<div class="moz-cite-prefix">On 3/21/20 7:27 PM, Kevin McCormick
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:96d1796e-b590-9d68-74d9-bf981d21b5d4@fastmail.fm">
<meta http-equiv="Content-Type" content="text/html;
charset=UTF-8">
<font size="+2" face="Liberation Sans">A little more
investigation reveals that the recommended driver for
Geforce GT 730M is 418.1130, I have 440,59 installed now.<br>
<br>
</font><br>
<div class="moz-cite-prefix">On 3/21/20 5:29 PM, Kevin
McCormick wrote:<br>
</div>
<blockquote type="cite"
cite="mid:9357b8ff-b6a9-23ba-3ee8-9ccacde29453@fastmail.fm">
<meta http-equiv="content-type" content="text/html;
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<font size="+2"><font face="Noto Sans">My computer:
Thinkpad T440p </font></font><br>
<font size="+2"><font face="Noto Sans">Slackware 14.2 with
many packages from SBo.<br>
</font></font><font size="+2"><font face="Noto Sans">video:
Nvidia GeForce GT 730M and Intel i5-4200M with GPU<br>
I mention the video because it may have something to do
with the problem.<br>
<br>
zoom-linux gives a flash on the screen and crashes.<br>
<br>
$ zoom-linux &<br>
. . .<br>
Graphics Card Info:: <br>
Zoom package arch is 64bit, runing OS arch is x86_64<br>
AppIconMgr::systemDesktopName log Desktop Name: <br>
QGLXContext: Failed to create dummy context<br>
qt.scenegraph.general: QSG: basic render loop<br>
qt.scenegraph.general: Using sg animation driver<br>
qt.svg: link image0 hasn't been detected!<br>
qt.svg: :/images/wechat.svg:10:6: Could not resolve
property: pattern0<br>
Failed to create OpenGL context for format
QSurfaceFormat(version 2.0, options
QFlags<QSurfaceFormat::FormatOption>(),
depthBufferSize 24, redBufferSize -1, greenBufferSize
-1, blueBufferSize -1, alphaBufferSize 8,
stencilBufferSize 8, samples -1, swapBehavior
QSurfaceFormat::SwapBehavior(DoubleBuffer), swapInterval
1, profile
QSurfaceFormat::OpenGLContextProfile(NoProfile)) <br>
ZoomLauncher: new dump generated from pid 20534, path:
/home/XXXXX/.zoom/logs/1524b74b-f164-461a-8ad868b2-dbb81244.dmp<br>
$HOME = /home/XXXXX<br>
sh: line 1: 20534 Aborted
/opt/zoom-linux/zoom ""<br>
success to create child process,status is 34304.<br>
zoom exited normally.<br>
Something went wrong while running zoom,exit code is
134.<br>
ZoomLauncher exit.<br>
<br>
I can't find anything helpful on this.<br>
<br>
Thanks<br>
</font></font> <br>
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