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Bug 161762 - xorg don't uses hw accel when run glx software with ATI Radeon
Summary: xorg don't uses hw accel when run glx software with ATI Radeon
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: xorg-x11
Version: 4.0
Hardware: i686
OS: Linux
Target Milestone: ---
: ---
Assignee: X/OpenGL Maintenance List
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2005-06-27 02:43 UTC by Hernan Petitti
Modified: 2013-03-13 06:46 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2005-09-20 19:13:50 UTC
Target Upstream Version:

Attachments (Terms of Use)

Description Hernan Petitti 2005-06-27 02:43:04 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.8) Gecko/20050512 Red Hat/1.0.4-1.4.1 Firefox/1.0.4

Description of problem:
when I run glxgears the rendering is very slow and the process takes a lot of cpu charge (100%)
The video card is
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY
on HP pavilion ze5165

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.start gnome session glxgears or other glx software

Actual Results:  glxgears renders at 90.000 fps and uses 100% cpu

Expected Results:  glxgears renders at 200.000 or more fps like FC3

Additional info:

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY

Section "Device"
        Identifier  "Videocard0"
        Driver      "radeon"
        VendorName  "Videocard vendor"
        BoardName   "ATI Radeon Mobility M6"
# it's the same with or without this options
#       Option      "RenderAccel" "on"
#       Option      "BusType" "AGP"
#       Option      "AGPMode" "4"
#       Option      "AGPFastWrite" "on"
#       Option      "DynamicClocks" "on"

Comment 1 Hernan Petitti 2005-06-28 01:56:14 UTC
Section "Module"
        Load  "dbe"
        Load  "extmod"
        Load  "fbdevhw"
        Load  "glx"
        Load  "record"
        Load  "freetype"
        Load  "type1"
        Load  "dri"

Comment 3 Mike A. Harris 2005-07-01 07:10:28 UTC
DRI support for Radeon is disabled by default in RHEL4 due to reported
instabilities of DRI with various Radeon chipsets.

For the time being, you must manually enable DRI by hand editing the config
file and adding to the Device section:

    Option "dri"

Official Red Hat support for this issue may be obtained by submitting
an official support request at or by
telephone at 1-888-RED-HAT1.

Comment 4 Mike A. Harris 2005-09-20 19:13:50 UTC
DRI was disabled by default on all Radeon hardware in RHEL4 due to
stability issues.  Users were able to manually override the default
however via reconfiguration, with the caveat that instability was

The latest updates for RHEL4 re-enable DRI by default on all Radeon
hardware except Radeon 7000.

Closing bug as fixed in the current errata release.

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