Created attachment 706796 [details] dd.htm User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:18.0) Gecko/20100101 Firefox/18.0 Build ID: 20130117041608 Steps to reproduce: In a certain web app, text is not draggable on some (not all) computers using Firefox 18 or 18.0.1. The bug happened to me on a Windows 7 pc, and a Linux laptop, though it didn't happen on a coworker's Windows machine. I have attached a minimal example page showing the problem. Actual results: In this example, the text should be draggable, to move to anywhere on the canvas. In every other browser, this example should work fine (Webkit, Opera, even IE). You can drag multiple times, moving anywhere on the canvas. In Firefox however, sometimes it didn't work at all, sometimes you must drag the area below the text to move it. I did find one solution to this problem: going to about:config and setting "gfx.canvas.azure.enabled" to false fixes it. Expected results: All Firefox installs should be able to run this example page without having to change an obscure setting in about:config.
Reproducing on nightly builds. User Agents: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20130128 Firefox/21.0 Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:21.0) Gecko/20130128 Firefox/21.0 Build ID: 20130128030943 Also, setting the "gfx.canvas.azure.enabled" to false fixes the problem, just like Luke reported.
According to this, Firefox 19 will not have the Azure fallback compatibility option? http://news.softpedia.com/news/Firefox-18-Uses-Azure-Canvas-by-Default-for-Faster-Graphics-299351.shtml Will this mean Firefox 19 will not have this workaround option to fix this issue?
I don't know if this helps, but here is the troubleshooting info from my about:support page, under graphics: Graphics Adapter Description Intel Open Source Technology Center -- Mesa DRI Intel(R) 965GM x86/MMX/SSE2 Device ID Mesa DRI Intel(R) 965GM x86/MMX/SSE2 Driver Version 2.1 Mesa 9.0 GPU Accelerated Windows 0/1 Basic Vendor ID Intel Open Source Technology Center WebGL Renderer Intel Open Source Technology Center -- Mesa DRI Intel(R) 965GM x86/MMX/SSE2 AzureCanvasBackend cairo AzureContentBackend none AzureFallbackCanvasBackend none I tried turning off hardware acceleration, that didn't fix it either, and it seems there is no option to make this work in Firefox 19 preview. I really hope this is fixed in Firefox 19, since rewriting web apps from Kinetic.js 3 to 4 is a significant task, and some features in 3 have not been implemented in the latest Kinetic.js 4. Best regards Luke
Here's the info in about:support, Graphics, for one machine on which this feature was working properly: Adapter Description Intel(R) HD Graphics Adapter Drivers igdumd64 igd10umd64 igdumdx32 igd10umd32 Adapter RAM Unknown Device ID 0x0042 Direct2D Enabled true DirectWrite Enabled true (6.1.7601.17789) Driver Date 1-10-2012 Driver Version 188.8.131.5222 GPU #2 Active false GPU Accelerated Windows 1/1 Direct3D 10 Vendor ID0x8086 WebGL Renderer Google Inc. -- ANGLE (Intel(R) HD Graphics) AzureCanvasBackend direct2d AzureContentBackend direct2d AzureFallbackCanvasBackend cairo
Here's another Windows machine not working: Graphics: Adapter Description ATI RADEON XPRESS 200 Series Adapter Drivers atiumdag atiumdva atitmmxx Adapter RAM Unknown Device ID 0x5a61 Direct2D Enabled Blocked for your graphics driver version. Try updating your graphics driver to version 10.6 or newer. DirectWrite Enabled false (6.1.7601.17789) Driver Date 6-2-2008 Driver Version 8.501.0.0 GPU #2 Active false GPU Accelerated Windows 0/1 Basic Blocked for your graphics driver version. Try updating your graphics driver to version 10.6 or newer. Vendor ID 0x1002 WebGL Renderer Blocked for your graphics driver version. Try updating your graphics driver to version 10.6 or newer. AzureCanvasBackend cairo AzureContentBackend none AzureFallbackCanvasBackend none I tested another Windows pc with this problem, which also had WebGL Renderer: unknown, GPU Accelerated Windows 0/1 Basic Blocked, cairo Azure-backend, and no Direct2d/DirectWrite Enabled. Perhaps this bug is caused by a bug in Cairo, or Firefox's fallback for not fully-supported graphics?
I have narrowed down the source of the problem with mozregression: Last good nightly: 2012-10-02 First bad nightly: 2012-10-03 Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=85dd8e346102&tochange=635fcc11d2b1
According to mozregression: The first bad revision is: changeset: 108887:a16dfb364f8c parent: 108886:da5df2c1ae16 parent: 108828:c9a8f55d8541 user: Ed Morley <emorley (at) mozilla.com> date: Tue Oct 02 11:19:03 2012 +0100 summary: Merge mozilla-central to mozilla-inbound Regression found using mozcommitbuilder 0.4.10 on linux2 at 2013-03-04 16:45:33
Hg bisect on that branch finds this to be the problem: The first bad revision is: changeset: 108853:aa73f5544e07 user: Anthony Jones <ajones (at) mozilla.com> date: Mon Oct 01 22:12:13 2012 -0400 summary: Bug 795135 - Fix CairoTempMatrix restore. r=joe
Just encountered this bug also and can confirm that it is preventing the draggable nature of Kinetic Text objects on a Windows platform. Using the general release builds of Firefox 18.0.1, 18.0.2, and 19 all function perfectly on OSX. However, the same general release versions of Firefox on Windows XP (only platform tested), all exhibit the issue of undraggable Kinetic Text objects. No errors are observed in the console; silent failure. I can also confirm that setting the gfx.canvas.azure.enabled option to false on general release 19.0.2 did not resolve the issue. Hopefully this is a quick fix.
Hi Jonathan, I noticed recently that the Firefox 20 beta does not have this issue, the Cairo Azure bug has been fixed. I've been using the beta for about a week, it seems more stable and fast than the current 19 release and also has a great new downloader. :)
Thanks for the update Luke. I will try to get a copy of v20 and see what happens. (In reply to Luke from comment #10) > Hi Jonathan, > > I noticed recently that the Firefox 20 beta does not have this issue, the > Cairo Azure bug has been fixed. > > I've been using the beta for about a week, it seems more stable and fast > than the current 19 release and also has a great new downloader. :)