HiDpi Scaling works with tool box but not intellij

What JDK version is used to run IntelliJ IDEA? See https://intellij-support.jetbrains.com/hc/articles/206544879.

Paste the info from About screen.

See idea.log (https://intellij-support.jetbrains.com/hc/articles/207241085) for the scaling factor detected by the IDE.

From the logs:

2018-06-03 09:37:43,800 [      0]   INFO -        #com.intellij.idea.Main - ------------------------------------------------------ IDE STARTED ------------------------------------------------------
2018-06-03 09:37:43,942 [    142]   INFO -        #com.intellij.idea.Main - IDE: IntelliJ IDEA (build #IU-181.5087.20, 17 May 2018 05:43)
2018-06-03 09:37:43,943 [    143]   INFO -        #com.intellij.idea.Main - OS: Linux (4.16.13-1-arch, amd64)
2018-06-03 09:37:43,943 [    143]   INFO -        #com.intellij.idea.Main - JRE: 1.8.0_152-release-1136-b39 (JetBrains s.r.o)
2018-06-03 09:37:43,943 [    143]   INFO -        #com.intellij.idea.Main - JVM: 25.152-b39 (OpenJDK 64-Bit Server VM)
2018-06-03 09:37:43,947 [    147]   INFO -        #com.intellij.idea.Main - JVM Args: -Xms128m -Xmx750m -XX:ReservedCodeCacheSize=240m -XX:+UseConcMarkSweepGC -XX:SoftRefLRUPolicyMSPerMB=50 -ea -Dsun.io.useCanonCaches=false -Djava.net.preferIPv4Stack=true -XX:+HeapDumpOnOutOfMemoryError -XX:-OmitStackTraceInFastThrow -Dawt.useSystemAAFontSettings=lcd -Dsun.java2d.renderer=sun.java2d.marlin.MarlinRenderingEngine -Dide.no.platform.update=true -XX:ErrorFile=/home/gz/java_error_in_IDEA_%p.log -XX:HeapDumpPath=/home/gz/java_error_in_IDEA.hprof -Didea.paths.selector=IntelliJIdea2018.1 -Djb.vmOptionsFile=/home/gz/.local/share/JetBrains/Toolbox/apps/IDEA-U/ch-0/181.5087.20.vmoptions -Didea.jre.check=true
2018-06-03 09:37:43,947 [    147]   INFO -        #com.intellij.idea.Main - ext: /home/gz/.local/share/JetBrains/Toolbox/apps/IDEA-U/ch-0/181.5087.20/jre64/lib/ext: [localedata.jar, meta-index, jfxrt.jar, cldrdata.jar, zipfs.jar, dnsns.jar, sunjce_provider.jar, sunpkcs11.jar, sunec.jar, nashorn.jar, jaccess.jar]
2018-06-03 09:37:43,947 [    147]   INFO -        #com.intellij.idea.Main - JNU charset: ANSI_X3.4-1968
2018-06-03 09:37:43,965 [    165]   INFO -        #com.intellij.idea.Main - JNA library (64-bit) loaded in 17 ms
2018-06-03 09:37:44,008 [    208]   INFO -     #com.intellij.util.ui.JBUI - User scale factor: 1.0
2018-06-03 09:37:44,008 [    208]   INFO -     #com.intellij.util.ui.JBUI - System scale factor: 1.0 (IDE-managed HiDPI)
2018-06-03 09:37:44,773 [    973]   INFO - .intellij.idea.IdeaApplication - CPU cores: 4; ForkJoinPool.commonPool: java.util.concurrent.ForkJoinPool@7f99e2b7[Running, parallelism = 3, size = 0, active = 0, running = 0, steals = 0, tasks = 0, submissions = 0]; factory: com.intellij.concurrency.IdeaForkJoinWorkerThreadFactory@3736cce4
2018-06-03 09:37:44,820 [   1020]   INFO - .intellij.idea.IdeaApplication - WM detected: KWin

Here's the About screen:

Please see https://youtrack.jetbrains.com/issue/IDEA-192797.

You can either increase the default font size (Settings > Appearance & Behavior > Appearance > Override default font) so that UI scaling factor is calculated from it or add -Dide.ui.scale=2.0 in Help | Edit Custom VM Options.

That's working fine !

Thanks !

It's nice that there is a work-a-round that works for some people, but in my case this requires me to change that setting dozens of times each day.

I have a laptop with a built-in 4K display (200% scaling), and an external 4K display (100% scaling).  When I unplug my external display everything resizes to fit on my scaled laptop screen.  Which is great!  Every other piece of software I am running resizes and looks perfect on the scaled laptop screen.  All JetBrains products turn into micro-print on the laptop screen and become unreadable until I plug in an external display or change the setting suggested above.  Gnome remembers my scaling and window positioning so well that I forget there is any scaling involved, it is completely seamless except for what happens to IntelliJ, CLion, DataGrip, and PyCharm when switching between screens.

I realize that my use case may not be the most common, but I wish JetBrains products worked like other apps do in gnome.  Thanks for listening.

https://youtrack.jetbrains.com/issue/IDEA-194145 could be related.

Does it help if you add -Dsun.java2d.uiScale.enabled=true in Help | Edit Custom VM Options and restart IntelliJ IDEA?

I also have this problem with a 4k monitor and 2 1080p monitors. IntelliJ looks blurry on the 4K monitor on Ubuntu Wayland with 200% desktop scaling.

Please specify the Java version you are using to run IntelliJ IDEA. Does it happen with JBR11 as well? https://intellij-support.jetbrains.com/hc/articles/206544879.

I had the same issue with PyCharm after updating to 2019.2. I fixed the issue by switching boot JDK to the one from PyCharm 2018.2

Please see https://intellij-support.jetbrains.com/hc/en-us/articles/360007994999.

Hi Serge, thanks for fast response. I checked your article and the only thing which works for me is:

IDE-managed HiDPI mode (legacy mode).

Enabled via the VM option:  -Dsun.java2d.uiScale.enabled=false

I have PyCharm community installed with snap on Ubuntu.

Setting -Dsun.java2d.uiScale.enabled=false

Also fixed the large scaling issue for me.

Pycharm 2019.2, Ubuntu 16.04, JDK 11.0.3+12

Thanks!