User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0 (Beta/Release) Build ID: 20131206145143 Steps to reproduce: Random text characters are garbled on web pages. The problem happens on all websites. Scrolling slightly or selecting text will fix the broken characters, but they often become garbled again as the page is scrolled farther. Disabling hardware rendering and various gfx settings in about:config does not fix the issue. Using different Firefox fonts does not fix the issue, nor does selecting "Allow websites to choose their own fonts". Issue does not occur with Chrome/Chromium or Midori browsers under Linux Mint, seems to be a Firefox font rendering issue. Expected results: Text should render clearly.
Doing a full ininstall/reinstall also does not fix the problem.
Could you please update your GPU driver, and then try the following : 1) try this with a clean profile: http://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles 2) running in Safe mode: http://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
(In reply to Manuela Muntean [:Manuela] [QA] from comment #2) > Could you please update your GPU driver, and then try the following : > > 1) try this with a clean profile: > http://support.mozilla.org/en-US/kb/profile-manager-create-and-remove- > firefox-profiles > > 2) running in Safe mode: > http://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe- > mode Running Firefox in Safe Mode didn't work, some text characters are still being distorted/garbled. I am unable to test creating a new profile, as I am using Linux and the instructions are for Windows only. However, I did a complete fresh install of Linux Mint 16 yesterday in the process of upgrading a hard drive. Before setting up Firefox Sync or installing any addons, I ran Firefox "fresh" (which should have the same effect as creating a new profile in this case.) I was still experiencing random text character distortion/garbling. This was with the latest stable Intel GMA graphics drivers for Linux Mint (and other Ubuntu derivatives.) I also compared it to Google Chrome and Midori browsers, and both render text without problems. Since I dual-boot, I also checked Firefox in Windows 7 on the same machine (exact same hardware, both 64-bit OS's) and it has no text rendering issues. This leads me to believe it's either a problem with Linux Mint 16 or with the current Linux (stable .DEB 64-bit package) version of Firefox. Please let me know if there are any OS or machine specs you'd like and I can do a dump and post the relevent information.
Could you attach a screenshot showing an example of the "garbled" rendering you're seeing? Thanks.
Created attachment 8348172 [details] Screenshot Demonstrating Text Rendering Issue This is the best I could capture. There are three or four characters improperly rendered. Often when I tried to do a screenshot, it fixes the characters because the screen refreshes. Problem may be related to the display server in Linux Mint 16 (X11?), but it seems like an OS problem would effect more than just one application. Mint 16 was just released a few days ago, but I'll have to check the official forums and see if anyone else is experiencing the same problem.
I can confirm the problem on Linux Mint Petra, Cinnamon edition, 32-bit with Intel graphics. However, I don't think this is a Firefox issue. I thought it was, but just now I was scrolling in a LibreOffice document and had exactly the same garbling of individual letters as I've been getting in Firefox.
Been trying replicate in LibreOffice and so far been unsuccessful, so please take that part of my comment with a pinch of salt.
(In reply to pyrosopher from comment #7) > Been trying replicate in LibreOffice and so far been unsuccessful, so please > take that part of my comment with a pinch of salt. Just had an "f" character garble while working on a LibreOffice write document in exactly the same way as happens in Firefox. I took a screenshot which did capture the corruption and like in Firefox, when the screen refreshed the garbling corrected itself. The font I was using at the time was LiberationSerif The incorrect character rendering is far less frequent in LibreOffice than in Firefox, but presents in the same way.
I don't think this is a Firefox issue. I've seen this problem in Firefox, Chrome, Gnome Terminal, Gedit, Libre Office, and others. I'm running Linux Mint 16 Cinnamon 64-bit with Intel GMA 3000 gpu. Highlighting text with the cursor makes the garbled characters act normal again. Try changing your theme and see if it happens again. https://github.com/linuxmint/Cinnamon/issues/2483
I got same problem latest stable Linux Mint. Sometimes random letters get distorted. It's gone when selecting it or scrolling it. But it will always be there slightly. Using Aspire X3910 machine with a default Acer LED screen. Sometimes annoying, but just slightly. Would be nice if this is fixed.