Dialog to access/open folder/file = total system freeze

RStudio IDE
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1

R studio is properly installed and seems to work great in all contexts, except when I try to use the standard dialog for opening a folder, file, or any other operation that accesses the file system. When doing so, everything ... the entire system, computer, etc. ... freezes. Is is possible that the computer would eventually respond, but during the freeze processor activity seems to peak because my fans all turn up. That leads me to abort by going to a new virtual terminal, (which does work), signing in, and forcing a shutdown or reboot.

This happens with the most current version of R-studio, RStudio 1.2.5001 - Ubuntu 18, as well as well as the bleeding edge version.

The Linux desktop I'm using is Ubuntu 18.04.3 LTS bionic, which is fully updated/upgraded.

Any suggestions would be much appreciated!

2

RStudio uses a bundled copy of Qt for some desktop operations; including opening of system file dialogs. We've occasionally seen issues like this when RStudio is forced to use a different copy of Qt than the one it was bundled with.

Can you try launching RStudio, then opening a terminal and running the following command?

lsof -p `pgrep -x rstudio` | grep Qt

This would help confirm whether or not RStudio is loading the expected Qt libraries.

3

Hi

Thanks, that is an interesting possibility. Nominally, Ubuntu 18.04 uses QT 5. The output of the one liner you gave me is below, and that seems to be the case, but I'm not sure about the exact-exact version or build.

I will note that I just installed Xubuntu on a laptop and tested Rstudio (but did not really use it, so I can't be sure) and there were no problems on that.

Since I'm using on my desktop what is probably the most commonly used form of Ubuntu, and I've not seen anyone else with this problem, it may be something more specific to my case. The install is fairly fresh, and I don't have anything that I think is strange going on. But, one could argue that Gnome 3.X is itself fairly iffy with the gnome extensions, of which I have a few.

Now that I think of it, I'll try removing gnome extensions to see if the problem goes away.

^[greg@cj:~lsof -p pgrep -x rstudio | grep Qt
rstudio 28221 greg mem REG 8,5 488320 23077050 /usr/lib/rstudio/lib/libQt5Svg.so.5
rstudio 28221 greg mem REG 8,5 2231768 23077058 /usr/lib/rstudio/lib/libQt5XcbQpa.so.5
rstudio 28221 greg mem REG 8,5 124376 23077047 /usr/lib/rstudio/lib/libQt5QuickWidgets.so.5
rstudio 28221 greg mem REG 8,5 6321136 23077045 /usr/lib/rstudio/lib/libQt5Qml.so.5
rstudio 28221 greg mem REG 8,5 8172640 23077038 /usr/lib/rstudio/lib/libQt5Core.so.5
rstudio 28221 greg mem REG 8,5 7848552 23077040 /usr/lib/rstudio/lib/libQt5Gui.so.5
rstudio 28221 greg mem REG 8,5 8443120 23077057 /usr/lib/rstudio/lib/libQt5Widgets.so.5
rstudio 28221 greg mem REG 8,5 2250464 23077041 /usr/lib/rstudio/lib/libQt5Network.so.5
rstudio 28221 greg mem REG 8,5 6604880 23077046 /usr/lib/rstudio/lib/libQt5Quick.so.5
rstudio 28221 greg mem REG 8,5 814672 23077043 /usr/lib/rstudio/lib/libQt5Positioning.so.5
rstudio 28221 greg mem REG 8,5 176640 23077053 /usr/lib/rstudio/lib/libQt5WebChannel.so.5
rstudio 28221 greg mem REG 8,5 119136328 23077055 /usr/lib/rstudio/lib/libQt5WebEngineCore.so.5
rstudio 28221 greg mem REG 8,5 786960 23077039 /usr/lib/rstudio/lib/libQt5DBus.so.5
rstudio 28221 greg mem REG 8,5 657840 23077044 /usr/lib/rstudio/lib/libQt5PrintSupport.so.5
rstudio 28221 greg mem REG 8,5 428328 23077056 /usr/lib/rstudio/lib/libQt5WebEngineWidgets.so.5
rstudio 28221 greg 96r REG 8,5 2231768 23077058 /usr/lib/rstudio/lib/libQt5XcbQpa.so.5
rstudio 28221 greg 140r REG 8,5 124376 23077047 /usr/lib/rstudio/lib/libQt5QuickWidgets.so.5
rstudio 28221 greg 141r REG 8,5 6321136 23077045 /usr/lib/rstudio/lib/libQt5Qml.so.5
rstudio 28221 greg 153r REG 8,5 8172640 23077038 /usr/lib/rstudio/lib/libQt5Core.so.5
rstudio 28221 greg 154r REG 8,5 7848552 23077040 /usr/lib/rstudio/lib/libQt5Gui.so.5
rstudio 28221 greg 155r REG 8,5 8443120 23077057 /usr/lib/rstudio/lib/libQt5Widgets.so.5
rstudio 28221 greg 156r REG 8,5 2250464 23077041 /usr/lib/rstudio/lib/libQt5Network.so.5
rstudio 28221 greg 157r REG 8,5 6604880 23077046 /usr/lib/rstudio/lib/libQt5Quick.so.5
rstudio 28221 greg 158r REG 8,5 814672 23077043 /usr/lib/rstudio/lib/libQt5Positioning.so.5
rstudio 28221 greg 159r REG 8,5 176640 23077053 /usr/lib/rstudio/lib/libQt5WebChannel.so.5
rstudio 28221 greg 160r REG 8,5 119136328 23077055 /usr/lib/rstudio/lib/libQt5WebEngineCore.so.5
rstudio 28221 greg 161r REG 8,5 786960 23077039 /usr/lib/rstudio/lib/libQt5DBus.so.5
rstudio 28221 greg 162r REG 8,5 657840 23077044 /usr/lib/rstudio/lib/libQt5PrintSupport.so.5
rstudio 28221 greg 163r REG 8,5 428328 23077056 /usr/lib/rstudio/lib/libQt5WebEngineWidgets.so.5

4

That output all looks as expected. Did you have any success by toggling your Gnome extensions on or off?

5

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