Problems with fglrx

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Revision as of 15:31, 16 November 2005 by 70.49.106.51 (Talk) (Beta Testing)

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This page discusses issues with the ATI proprietary fglrx display driver.

Known Troubles and Solutions

No hardware acceleration

If the ATI driver works only without the hardware acceleration, take into consideration that fglrx_dri.so was linked against libstdc++.so.5 which may not be present if your system uses gcc-3.4.

To fix this, compile gcc-3.3.5 and copy libstdc++.so.5* to /usr/lib and update the dynamic linker cache via # ldconfig.

Another possible cause for broken hardware acceleration (2D and 3D) is the radeonfb framebuffer: Switching to vesafb or vesafb-tng is reported to solve the problem on some systems. Also it has proven helpful to not perform # modprobe fglrx after boot but to have the module loaded via /etc/modules.autoload/kernel2.x at boottime instead.

Troubles using software suspend

When the computer resumes from suspend, X only displays a garbled image and the computer is frozen. The problem is acknowledged in ATI's release notes and in knowledge base entry 737-218. Driver version 8.19.10 has "initial support for Suspend and Resume".

Using vbetool to save/restore the video card state before/after suspend solved this for some people. If you use Software Suspend 2 (suspend2) scripts, you can simply uncomment EnableVbetool yes in /etc/hibernate/hibernate.conf.

tested with the following configurations
model distro kernel fglrx PM success comments
T42 SUSE 9.3 2.6.11 8.14.13 swsusp yes
T41p ??? 2.6.14 8.19.10 suspend2 2.2-rc9 yes needs a small patch
T42p Debian 2.6.10 Debian packaged suspend2 yes
T43 ??? 2.6.12-rc6 8.14.13 suspend2 no works if fglrx kernel driver not loaded
T43 FC3 2.6.14.1 8.19.10 suspend2 2.2-rc9 yes needs a small patch
R50p ??? ??? 8.19.10 swsusp yes

Troubles with large RAM

Version 8.14.13 (and probably earlier versions) of the driver does not seem to be able to cope with large amounts of RAM: with 512 MB it works, with 1.5 GB it crashes the machine as soon as X is started. The problem is present only if the fglrx kernel module is loaded, but independently of whether (CONFIG_HIGHMEM) is enabled. A workaround is to limit RAM by adding the mem=864m kernel parameter.

Version 8.16.20 fixes the problem.

Display switching

The switching between internal and external display doesn't work, because the driver blocks messing around with the chipset via ACPI. If you want to use this feature (i.e. during presentations), you should use the VESA server instead (experienced with a R52, Kernel 2.6.11, xorg 6.8.2, fglrx 8.16.20).

Patches

The following patches might be needed for certain versions of fglrx.

V 8.8.25

Beta Testing

The fglrx developers are looking for T Series users to take part in their beta program.

If interested, plese contact mtippett (at) ati.com.

[NOTE: The above email address does not seem to be working any more. I am getting mail delivery notification errors for this email address]