Closed Bug 1264252 Opened 8 years ago Closed 8 years ago

Fonts are rendered antialiased even if system-wide AA setting is "off"

Categories

(Core :: Graphics: Text, defect)

43 Branch
All
Windows
defect
Not set
normal

Tracking

()

RESOLVED DUPLICATE of bug 1145987

People

(Reporter: andrewbass, Unassigned)

References

()

Details

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(1 file)

The issue has been observed on Windows 8.1, but I'm pretty sure other Windows versions may exhibit the same behaviour, too.

Product versions affected are Firefox 43/SeaMonkey 2.40 (as well as earlier versions with HW acceleration).

Certain graphics card driver settings (particularly, "Application Optimal Mode" and "Conservative Morphological Anti-Aliasing" for Intel HD Graphics) may cause:

 1. fonts being displayed antialiased when system-wide AA setting is "off" (for both full-pixel AA and ClearType), or
 2. visual glitches with fonts display (see the screenshot attached).

The only workaround it to turn HW acceleration off or, more particularly, set layers.acceleration.disabled to true. More information is available at <https://superuser.com/questions/1064589>.

Even if this issue does not result in any code changes, I believe it makes sense to describe the above behaviour in the Release Notes.
SeaMonkey 2.40 screenshot with distorted fonts.
Component: Layout: Text → Graphics: Text
Your bug is probably a dupe of bug 1145987 (Intel HD Graphics). A previous bug has been filed for AMD (bug 612081).
Indeed. Marking as duplicate. Thank you!
Status: UNCONFIRMED → RESOLVED
Closed: 8 years ago
Resolution: --- → DUPLICATE
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