Arch Linux

Description:

The Markdown plugin preview panel is not shown for markdown files in the latest version of PyCharm. Viewing Settings -> Languages & Frameworks -> Markdown displays the message "There are no available preview providers."

Googling the issue resulted in pages suggesting installing the already-installed java11-openjfx package.

I was able get the preview panel to display with the bundled Java runtime (JBR) using the following steps:
1. Download the package from the PyCharm download site
2. Extract the jbr directory from the tarball
3. Run pycharm with the PYCHARM_JDK environment variable set to the full path of the extracted jbr directory: `env PYCHARM_JDK=/full/path/to/jbr pycharm`

Because of my success with the bundled runtime, I'm not sure if this is a java runtime (java11-openjfx) issue or an issue with the pycharm-community-edition package.


Package versions:
* java11-openjfx 11.0.10.u1-1
* jdk11-openjdk 11.0.12.u7-1
* jre11-openjdk 11.0.12.u7-1
* jre11-openjdk-headless 11.0.12.u7-1
* pycharm-community-edition 2021.2.2-1


Log output:

There isn't much of anything helpful in the log, except maybe for the last line included in the partial idea.log below. No errors or stack traces.
```
2021-09-27 16:03:57,754 [ 0] INFO - #com.intellij.idea.Main - ------------------------------------------------------ IDE STARTED ------------------------------------------------------
2021-09-27 16:03:57,855 [ 101] INFO - #com.intellij.idea.Main - IDE: PyCharm (build #PC-212.5284.44, 15 Sep 2021 12:45)
2021-09-27 16:03:57,857 [ 103] INFO - #com.intellij.idea.Main - OS: Linux (5.14.8-arch1-1, amd64)
2021-09-27 16:03:57,868 [ 114] INFO - #com.intellij.idea.Main - JRE: 11.0.12+7 (Oracle Corporation)
2021-09-27 16:03:57,868 [ 114] INFO - #com.intellij.idea.Main - JVM: 11.0.12+7 (OpenJDK 64-Bit Server VM)
2021-09-27 16:03:57,870 [ 116] INFO - #com.intellij.idea.Main - JVM Args: -Xms128m -Xmx2048m -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 -XX:ErrorFile=/home/brandon/java_error_in_pycharm_%p.log -XX:HeapDumpPath=/home/brandon/java_error_in_pycharm_.hprof -Djb.vmOptionsFile=/home/brandon/.config/JetBrains/PyCharmCE2021.2/pycharm64.vmoptions -Djava.system.class.loader=com.intellij.util.lang.PathClassLoader -Didea.vendor.name=JetBrains -Didea.paths.selector=PyCharmCE2021.2 -Didea.platform.prefix=PyCharmCore -Dsplash=true
2021-09-27 16:03:57,870 [ 116] INFO - #com.intellij.idea.Main - library path: /usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib
2021-09-27 16:03:57,870 [ 116] INFO - #com.intellij.idea.Main - boot library path: /usr/lib/jvm/java-11-openjdk/lib
2021-09-27 16:03:57,892 [ 138] INFO - #com.intellij.idea.Main - locale=en_US JNU=UTF-8 file.encoding=UTF-8
idea.config.path=/home/brandon/.config/JetBrains/PyCharmCE2021.2
idea.system.path=/home/brandon/.cache/JetBrains/PyCharmCE2021.2
idea.plugins.path=/home/brandon/.local/share/JetBrains/PyCharmCE2021.2
idea.log.path=/home/brandon/.cache/JetBrains/PyCharmCE2021.2/log
2021-09-27 16:03:57,902 [ 148] INFO - #com.intellij.idea.Main - CPU cores: 8; ForkJoinPool.commonPool: java.util.concurrent.ForkJoinPool@76fe856[Running, parallelism = 7, size = 7, active = 3, running = 3, steals = 3, tasks = 0, submissions = 0]; factory: com.intellij.concurrency.IdeaForkJoinWorkerThreadFactory@5a58c403
2021-09-27 16:03:57,923 [ 169] INFO - #com.intellij.idea.Main - JNA library (64-bit) loaded in 21 ms
2021-09-27 16:03:58,000 [ 246] INFO - llij.ide.plugins.PluginManager - Loaded bundled plugins: IDEA CORE (212.5284.44), EditorConfig (212.5284.44), Machine Learning Code Completion (212.5284.44), Mercurial (212.5284.44), ReStructuredText (212.5284.44), Subversion (212.5284.44), Configuration Script (212.5284.44), IntelliLang (212.5284.44), Settings Repository (212.5284.44), Terminal (212.5284.44), Emoji Picker (212.5284.44), Task Management (212.5284.44), TextMate Bundles (212.5284.44), Copyright (212.5284.44), Shell Script (212.5284.44), Images (212.5284.44), Markdown (212.5284.44), Properties (212.5284.44), IDE Features Trainer (212.5284.44), Git (212.5284.44), IDE Features Trainer: Git Lessons (212.5284.44), ChangeReminder (212.5284.44), YAML (212.5284.44), Grazie (212.5284.44), Python Community Edition (212.5284.44), PyCharm Community Customization (212.5284.44), GitHub (212.5284.44)
2021-09-27 16:03:58,001 [ 247] INFO - llij.ide.plugins.PluginManager - Loaded custom plugins: IdeaVim (1.7.1), Ini (212.4746.57), Toml (0.2.155.4114-212), String Manipulation (8.15.203.000.3), CSV (2.17.1)
2021-09-27 16:03:58,689 [ 935] INFO - om.intellij.ui.scale.JBUIScale - System scale factor: 1.0 (IDE-managed HiDPI)
2021-09-27 16:03:58,943 [ 1189] INFO - #com.intellij.idea.Main - WM detected: GNOME Shell
2021-09-27 16:03:58,964 [ 1210] WARN - ntellij.ui.svg.SvgCacheManager - Icon cache will be recreated or previous version of data reused, (db=/home/brandon/.cache/JetBrains/PyCharmCE2021.2/icons-v3.db)
2021-09-27 16:03:59,079 [ 1325] INFO - ication.options.PathMacrosImpl - Loaded path macros: {}
2021-09-27 16:03:59,169 [ 1415] INFO - rains.ide.BuiltInServerManager - built-in server started, port 63342
2021-09-27 16:03:59,231 [ 1477] WARN - tor.impl.FontFamilyServiceImpl - Couldn't access required runtime API, will fall back to basic logic of font selection
2021-09-27 16:03:59,405 [ 1651] INFO - intellij.util.io.FilePageCache - lower=100; upper=500; buffer=10; max=1961
2021-09-27 16:03:59,511 [ 1757] INFO - til.net.ssl.CertificateManager - Default SSL context initialized
2021-09-27 16:03:59,778 [ 2024] WARN - nSystem.impl.ActionManagerImpl - keymap "Visual Studio" not found [Plugin: com.intellij]
2021-09-27 16:03:59,781 [ 2027] WARN - nSystem.impl.ActionManagerImpl - keymap "Eclipse" not found [Plugin: com.intellij]
2021-09-27 16:03:59,782 [ 2028] WARN - nSystem.impl.ActionManagerImpl - keymap "NetBeans 6.5" not found [Plugin: com.intellij]
2021-09-27 16:03:59,782 [ 2028] WARN - nSystem.impl.ActionManagerImpl - keymap "Visual Studio" not found [Plugin: com.intellij]
2021-09-27 16:03:59,847 [ 2093] WARN - tellij.ide.SystemHealthMonitor - issue detected: bundled.jre.version.message (ignored)
2021-09-27 16:03:59,954 [ 2200] WARN - nSystem.impl.ActionManagerImpl - keymap "Eclipse" not found [Plugin: PythonCore]
2021-09-27 16:03:59,954 [ 2200] WARN - nSystem.impl.ActionManagerImpl - keymap "NetBeans 6.5" not found [Plugin: PythonCore]
2021-09-27 16:03:59,962 [ 2208] WARN - nSystem.impl.ActionManagerImpl - keymap "Eclipse" not found [Plugin: org.jetbrains.plugins.github]
2021-09-27 16:03:59,980 [ 2226] INFO - leBasedIndexDataInitialization - Index data initialization done: 290 ms. Initialized indexes: [FilenameIndex, FrameworkDetectionIndex, TodoIndex, IdIndex, filetypes, Stubs, Trigram.Index, fileIncludes, DomFileIndex, RelaxSymbolIndex, XmlTagNames, XmlNamespaces, html5.custom.attributes.index, SchemaTypeInheritance, json.file.root.values, editorconfig.index.name, xmlProperties, yaml.keys.name, Py.module.name, Py.setuptools.namespace].
2021-09-27 16:03:59,991 [ 2237] INFO - penapi.application.Experiments - Experimental features enabled for user: wsl.p9.support, wsl.prefer.p9.support, wsl.p9.show.roots.in.file.chooser, wsl.execute.with.wsl.exe, linux.native.menu, recent.and.edited.files.together, show.create.new.element.in.popup, search.everywhere.mixed.results, editor.reader.mode, new.large.text.file.viewer
2021-09-27 16:03:59,995 [ 2241] INFO - penapi.wm.impl.GlobalMenuLinux - Start glib main loop in thread: GlobalMenuLinux loop
2021-09-27 16:03:59,997 [ 2243] INFO - penapi.wm.impl.GlobalMenuLinux - Closed dbus-service 'com.canonical.AppMenu.Registrar'
2021-09-27 16:04:00,024 [ 2270] INFO - penapi.application.Experiments - Experimental feature 'terminal.shell.command.handling' is now turned OFF
2021-09-27 16:04:00,030 [ 2276] INFO - exImpl$StubIndexInitialization - Index data initialization done: 49 ms. Initialized stub indexes: {Py.class.attributes, Py.function.shortName, ini.property.key, Py.class.shortName, Py.variable.shortName, Python.Decorator, Py.class.super, Py.class.shortNameInsensitive, Py.module.attribute, properties.index, markdown.header, dom.elementClass, dom.namespaceKey}.
2021-09-27 16:04:00,216 [ 2462] INFO - pl.local.NativeFileWatcherImpl - Starting file watcher: /usr/share/pycharm/bin/fsnotifier
2021-09-27 16:04:00,247 [ 2493] INFO - pl.local.NativeFileWatcherImpl - Native file watcher is operational.
2021-09-27 16:04:00,564 [ 2810] INFO - penapi.wm.impl.GlobalMenuLinux - created instance of GlobalMenuLinux for xid=0x2e00047
2021-09-27 16:04:00,668 [ 2914] INFO - rojectCodeStyleSettingsManager - Initialized from default code style settings.
2021-09-27 16:04:00,674 [ 2920] INFO - eStyle.CustomCodeStyleSettings - Loaded com.jetbrains.python.formatter.PyCodeStyleSettings
2021-09-27 16:04:00,675 [ 2921] INFO - eStyle.CommonCodeStyleSettings - Loaded Python common code style settings
2021-09-27 16:04:00,695 [ 2941] INFO - el.ide.impl.WorkspaceModelImpl - Load workspace model from cache in 514 ms
2021-09-27 16:04:00,749 [ 2995] WARN - #com.intellij.ui.jcef.JBCefApp - JCEF runtime library is not a JBR module (Use JBR bundled with the IDE)
...
```

Steps to reproduce:
1. Install pycharm-community-edition 2021.2.2-1
2. Launch Pycharm
3. Ensure the Markdown plugin is enabled
4. Open a markdown file (e.g. /usr/share/licenses/java11-openjdk/java.base/unicode.md)
5. Click File -> Settings -> Languages & Frameworks -> Markdown