{"id":2239,"date":"2008-12-04T17:57:46","date_gmt":"2008-12-04T17:57:46","guid":{"rendered":"http:\/\/t.motd.kr\/articles\/2239\/how-to-work-around-intellij-idea-8-ui-slowdown-issue-with-intel-x11-driver"},"modified":"2022-12-28T01:45:27","modified_gmt":"2022-12-27T16:45:27","slug":"how-to-work-around-intellij-idea-8-ui-slowdown-issue-with-intel-x11-driver","status":"publish","type":"post","link":"https:\/\/vault.motd.kr\/wordpress\/posts\/2239\/how-to-work-around-intellij-idea-8-ui-slowdown-issue-with-intel-x11-driver\/","title":{"rendered":"How to Work Around IntelliJ IDEA 8 UI Slowdown Issue with Intel X11 Driver"},"content":{"rendered":"\n<p>I have been trying to switch from <a href=\"http:\/\/www.eclipse.org\/\">Eclipse<\/a> to <a href=\"http:\/\/www.jetbrains.com\/idea\/\">IntelliJ <span class=\"caps\">IDEA<\/span><\/a> recently. However, <span class=\"caps\">IDEA<\/span> 8, the latest version, has shown me horribly unresponsive UI. Especially, the slow scroll in the editor window was intolerable; any keystroke that involves scrolling took up 100% <span class=\"caps\">CPU<\/span> and only a couple lines were scrolled for a second. I could hardly edit my source code and had to go back to Eclipse.<\/p>\n\n\n\n<p>Today, I\u2019ve finally figured out what exactly was causing the problem \u2013 the intel video driver of X.org X11 server. In <a href=\"http:\/\/www.fedoraproject.org\/\">Fedora<\/a> 10, the default video acceleration method of the intel video driver is \u2018<span class=\"caps\">EXA<\/span>\u2019. According to the man page of the intel video driver (type <code>man intel<\/code> in your terminal), <span class=\"caps\">EXA<\/span> is a newer and simpler acceleration architecture designed to better accelerate the X Render extension.<\/p>\n\n\n\n<p>However, it seems like there\u2019s a known performance issue with <span class=\"caps\">EXA<\/span> that slows down most Java Swing applications and some web pages in Firefox. So, I switched back to <span class=\"caps\">XAA<\/span>, the old XFree86 based acceleration architecture. Switchback is as simple as modifying the <code>Device<\/code> section of the <code>\/etc\/X11\/xorg.conf<\/code> file:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Section \"Device\"\n    Identifier  \"Default Video Card\"\n    Driver      \"intel\"\n    ...\n    Option      \"AccelMethod\"  \"XAA\"\n    ...\nEndSection<\/code><\/pre>\n\n\n\n<p>After restarting the X server, I am seeing noticeable improvement in the responsiveness of all <span class=\"caps\">GUI<\/span> applications including <span class=\"caps\">IDEA<\/span> 8, Firefox, and even some <span class=\"caps\">GTK<\/span>+ applications.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Update (Dec 16, 2008)<\/h2>\n\n\n\n<p>However, some users have reported that switching back to <span class=\"caps\">XAA<\/span> causes artifacts in rendering and segmentation faults in some applications. Actually, I also experienced some UI glitches in a particular application, but I didn\u2019t care much about it. A couple days ago, I found a way to improve the overall performance of <span class=\"caps\">EXA<\/span>. Update your <code>xorg.conf<\/code> as follows:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Section \"Device\"\n    Identifier  \"Default Video Card\"\n    Driver      \"intel\"\n    ...\n    Option      \"AccelMethod\"          \"EXA\"\n    Option      \"MigrationHeuristic\"   \"greedy\"\n    Option      \"ExaNoComposite\"       \"false\"\n    Option      \"ExaOptimizeMigration\" \"true\"\n    ...\nEndSection<\/code><\/pre>\n\n\n\n<p>IntelliJ wouldn\u2019t perform as well as it does with <span class=\"caps\">XAA<\/span>, but you will find it acceptable.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I have been trying to switch from Eclipse to IntelliJ IDEA recently. However, IDEA 8, the latest version, has shown me horribly unresponsive UI. Especially, the slow scroll in the editor window was intolerable; any keystroke that involves scrolling took up 100% CPU and only a couple lines were scrolled for a second. I could&#8230; <a class=\"more-link\" href=\"https:\/\/vault.motd.kr\/wordpress\/posts\/2239\/how-to-work-around-intellij-idea-8-ui-slowdown-issue-with-intel-x11-driver\/\">Continue reading <span class=\"meta-nav\">&#8594;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"yoast_head":"<title>How to Work Around IntelliJ IDEA 8 UI Slowdown Issue with Intel X11 Driver &#8212; T&#039;s message of the day<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vault.motd.kr\/wordpress\/posts\/2239\/how-to-work-around-intellij-idea-8-ui-slowdown-issue-with-intel-x11-driver\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Work Around IntelliJ IDEA 8 UI Slowdown Issue with Intel X11 Driver &#8212; T&#039;s message of the day\" \/>\n<meta property=\"og:description\" content=\"I have been trying to switch from Eclipse to IntelliJ IDEA recently. However, IDEA 8, the latest version, has shown me horribly unresponsive UI. Especially, the slow scroll in the editor window was intolerable; any keystroke that involves scrolling took up 100% CPU and only a couple lines were scrolled for a second. I could... 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