Build Identifier: http://hg.mozilla.org/mozilla-central/rev/e777c939a3f9 Mozilla/5.0 (X11; Linux i686; rv:13.0a1) Gecko/20120203 Firefox/13.0a1 ID:20120203031138 I encounter this bug when I test Bug 724086 Laggy scrolling on http://johnpolacek.github.com/scrollorama/ with HWA off Moving focus helps. Reproducible: Always Steps to Reproduce: 1. Start Firefox with clean profile + HWA off 2. Open http://johnpolacek.github.com/scrollorama/ 3. Scroll up and down slowly Actual Results: Scrolling is laggy Expected Results: No lag Regression window(m-c) Works: http://hg.mozilla.org/mozilla-central/rev/e79ef0ffcb09 Mozilla/5.0 (X11; Linux i686; rv:12.0a1) Gecko/20120111 Firefox/12.0a1 ID:20120111031049 Fails: http://hg.mozilla.org/mozilla-central/rev/8ffdb4c7404a Mozilla/5.0 (X11; Linux i686; rv:12.0a1) Gecko/20120112 Firefox/12.0a1 ID:20120112031044 Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=e79ef0ffcb09&tochange=8ffdb4c7404a Regression window(m-i) Works: http://hg.mozilla.org/integration/mozilla-inbound/rev/fe35840e0000 Mozilla/5.0 (X11; Linux i686; rv:12.0a1) Gecko/20120111 Firefox/12.0a1 ID:20120111031623 Fails: http://hg.mozilla.org/integration/mozilla-inbound/rev/7c9a9e02b08c Mozilla/5.0 (X11; Linux i686; rv:12.0a1) Gecko/20120111 Firefox/12.0a1 ID:20120111032724 Pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=fe35840e0000&tochange=7c9a9e02b08c

Graphics Adapter Description : GLXtest process failed (exited with status 1): GLX version older than the required 1.3 WebGL Renderer : Brian Paul -- Mesa OffScreen -- 2.1 Mesa 7.7.1 GPU Accelerated Windows : 0. Blocked for your graphics driver version. Try updating your graphics driver to version <Anything with EXT_texture_from_pixmap support> or newer. AzureBackend : skia

seems no problem on Nightly53.0a1