Troubleshooting

2012-05-14T21:58:35Z

120.203.7.66: /* aticonfig Issues */

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==AMD installer script completes, fglrx X driver loads, fglrxinfo reports error==

Xorg.log reports 2d/3d acceleration disabled, DRI disabled and uki errors related to /proc/ati files. AMD control panel works.

This can happen if there is a problem w/ the AMD installer compiling the fglrx.ko kernel module. The installation completes anyway with the fglrx Xorg driver in place. As per 2.6.42.9 and the 12.1 AMD driver there was a compile error in/usr/src/fglrx-8.93/firegl_public.c, due to TS_USEDFPU macro not being defined. Other compile-time errors will produce a similar problem. Check the contents of /usr/share/ati/fglrx-install.log, note if there was a compile error. If so, re-running the AMD installer will not fix the problem since the compile error will just recur. Likewise, patching the bug ie

http://phoronix.com/forums/showthread.php?68922-Patch-to-compile-fgrlx-module-on-Linux-3-3-rc4-with-x86-32-bit-arch

and then reinstalling won't help either since the installer re-extracts the source from the archive. To fix, apply whatever fix is required to the sourcecode that the installer leaves in /usr/src/fglrx-xxx and use dkms to compile and install the driver.

dkms add fglrx/8.93 /usr/src/fglrx-8.93 
dkms build fglrx/8.93 
dkms install fglrx/8.93 

Apply fixes to the fglrx source and repeat the dkms build step until the build completes, then install & reboot. Check lsmod output to see if fglrx.ko is loaded, confirm DRI and proc stuff in Xorg.log is working.

In the 2.6.42.9 w/ 12.1 bug case, the fix is to add the TS_USEDFPU ifdef in firegl_public.c as below;

void ATI_API_CALL KCL_fpu_begin(void) 
{ 
<nowiki>#ifdef CONFIG_X86_64</nowiki>
kernel_fpu_begin();
<nowiki>#else</nowiki> 
<nowiki>#ifndef TS_USEDFPU</nowiki>
preempt_disable();
if (__thread_has_fpu(current))
__save_init_fpu(current);
<nowiki>#else</nowiki>
struct thread_info *cur_task = current_thread_info();
preempt_disable();
if (cur_task->status & TS_USEDFPU)
__save_init_fpu(cur_task->task);
<nowiki>#endif</nowiki>
else
clts();
<nowiki>#endif</nowiki>
}

==References==
<references/>

[[Category:Installation Documentation]]

[[Category:NeedsUpdating]]
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Troubleshooting