I'm still seeing this behaviour on 18.04 LTS in both chromium and google-chrome.
To workaround the issue, visit chrome://flags/ and search for "partial". An option called "Partial swap" should appear, with a flag called "#ui- disable-partial-swap". Set the associated dropdown to say "Disabled". Then press "Restart" and let the browser restart itself. Then visit chrome://gpu/ and verify that the last item in the first table under "Version Information" is "Command Line", and than "--ui-disable-partial- swap" appears in the list of commandline options. For me this doesn't fix 100% of the problem, but makes it much better -- when maximizing the browser window, there isn't garbage at the top of the window. On restoring the window, the problem (or a similar problem) is still there, but simply mousing over it makes it go away; unlike before, I don't need to run the mouse over sections of the window trying to get it to repaint the whole width of the corrput area. -- You received this bug notification because you are a member of UBUNTU - AL - BR, which is subscribed to Chromium Browser. https://bugs.launchpad.net/bugs/1309076 Title: Chromium-custom title bar corrupt after maximize&restore Status in Chromium Browser: Unknown Status in chromium-browser package in Ubuntu: Fix Released Bug description: If the window is maximized, try to restore it and the window title bar, address bar or toolbar will not be rendered correctly also try hovering over them which show the issue. Also tested while extensions are disabled. You can see that problem in the attached screenshot. Version 34.0.1847.116 Ubuntu 14.04 aura (260972) Ubuntu 14.04 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: chromium-browser 34.0.1847.116-0ubuntu2 [modified: usr/bin/chromium-browser] Uname: Linux 3.14.0-eudyptula-10313-g39aaf74-dirty x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Thu Apr 17 17:31:21 2014 Desktop-Session: DESKTOP_SESSION = ubuntu XDG_CONFIG_DIRS = /etc/xdg/xdg-ubuntu:/usr/share/upstart/xdg:/etc/xdg XDG_DATA_DIRS = /usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/ DetectedPlugins: Env: MOZ_PLUGIN_PATH = None LD_LIBRARY_PATH = None InstallationDate: Installed on 2014-03-24 (24 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64+mac (20131016.1) SourcePackage: chromium-browser UpgradeStatus: Upgraded to trusty on 2014-03-29 (19 days ago) chromium-default: CHROMIUM_FLAGS="" gconf-keys: /desktop/gnome/applications/browser/exec = b'/usr/bin/chromium-browser\n'/desktop/gnome/url-handlers/https/command = b'/usr/bin/chromium-browser %s\n'/desktop/gnome/url-handlers/https/enabled = b'true\n'/desktop/gnome/url-handlers/http/command = b'/usr/bin/chromium-browser %s\n'/desktop/gnome/url-handlers/http/enabled = b'true\n'/desktop/gnome/session/required_components/windowmanager = b''/apps/metacity/general/compositing_manager = b''/desktop/gnome/interface/icon_theme = b'gnome\n'/desktop/gnome/interface/gtk_theme = b'Clearlooks\n' modified.conffile..etc.default.chromium.browser: [deleted] To manage notifications about this bug go to: https://bugs.launchpad.net/chromium-browser/+bug/1309076/+subscriptions -- Mailing list: https://launchpad.net/~linux-traipu Post to : linux-traipu@lists.launchpad.net Unsubscribe : https://launchpad.net/~linux-traipu More help : https://help.launchpad.net/ListHelp