Bug 94246

Summary:

Text shadow is rendered incorrectly on Radeon R7 260X

Product:

xorg

Reporter:

Steffen <smikkelsendk>

Component:

Server/Acceleration/glamor

Assignee:

Xorg Project Team <xorg-team>

Status:

RESOLVED FIXED

QA Contact:

Xorg Project Team <xorg-team>

Severity:

normal

Priority:

medium

Version:

git

Hardware:

Other

OS:

All

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
Log from Xorg with default options	none
Log from Xorg with ShadowPrimary enabled	none
Screenshot with ShadowPrimary enabled	none
Screenshot with default options	none
Screenshot with default options	none
Screenshot showing how text shadow is rendered differently depending on options	none

Description Steffen 2016-02-22 11:46:27 UTC

Created attachment 121882 [details]
Log from Xorg with default options

I noticed some texts were looking blurry depending on my MATE Desktop theme and filed a bug report to MATE team (https://github.com/mate-desktop/mate-themes/issues/104). We discovered that the problem is that my GFX card renders text shadows incorrectly.

Adding this option fixes the problem:
	Option "ShadowPrimary" "true"
This has a side effect of disabling pageflipping. However just disabling pageflipping alone does not fix the problem.

Also if I turn off acceleration completely with:
        Option "Accel" "false"

The problem also is fixed.

Attached: Screenshot and XOrg log of when the problem appears (default options) and when it is fixed (enabling ShadowPrimary)

Comment 1 Steffen 2016-02-22 11:46:58 UTC

Created attachment 121883 [details]
Log from Xorg with ShadowPrimary enabled

Comment 2 Steffen 2016-02-22 11:47:27 UTC

Created attachment 121884 [details]
Screenshot with ShadowPrimary enabled

Comment 3 Steffen 2016-02-22 11:47:44 UTC

Created attachment 121885 [details]
Screenshot with default options

Comment 4 Steffen 2016-02-22 11:48:26 UTC

Created attachment 121886 [details]
Screenshot with default options

Comment 5 Steffen 2016-02-22 11:51:24 UTC

Created attachment 121887 [details]
Screenshot showing how text shadow is rendered differently depending on options

I messed up the previous screenshot attachments, please look at this one instead

Comment 6 Michel Dänzer 2016-02-23 08:21:08 UTC

This is a glamor issue, proposed fix at https://patchwork.freedesktop.org/patch/74719/ .

Comment 7 Michel Dänzer 2016-03-09 06:30:03 UTC

commit a3e681eafa5355b8bb3b099d47983f14f0d5e197
Author: Michel Dänzer <michel.daenzer@amd.com>
Date:   Tue Feb 23 17:19:03 2016 +0900

    glamor: Source pictures are always depth 32

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.