From Bugzilla Helper: User-Agent: Mozilla/4.75 [en] (X11; U; Linux 2.2.16-22 i486) Description of problem: Xconfigurator dumps core with "illegal instruction" when RH7.0 is booted with Loadlin 6.1from MSDOS 5.0 running Qemm 8. It works fine when booted with RH7.0 boot disk, or when booted with MSDOS 5 boot disk and Loadlin 6.1 is run from command prompt. Version-Release number of selected component (if applicable): How reproducible: Didn't try Additional info: I have Linux installed on its own drive (hdb), and boot to a DOS /Win3.11 drive (hda.) The machine is question was upgraded from RH 6.0 to 7.0 and working fine. One day X Windows wouldn't start (dumped core.) I ran Xconfigurator, and it crashed also. I tried to run xf86config, but the resulting XF86Config file didn't work because of "no mouse." I re-installed (Custom Upgrade} all the XFree rpms from the RH CD. Now Xwindows would start, but Xconfigurator continued to crash. When trying xf86cfg, I noticed that there was a "ghost image" of my MSDOS screen. Since my MSDOS drive isn't mounted, I assumed there must be something strange going on with the video memory.
Created attachment 47281 [details] gdb output of Xconfigurator core dump
It appears that either your hardware is faulty, or your installation is corrupt. At any rate, we do not support LOADLIN, so if the problem is not reproduceable without loadlin by using supported booting/installation methods, then it is outside of the scope of what we support. Illegal instruction does not indicate a software bug generally, but data corruption. QEMM could be causing this perhaps.
Thanks for the insights. I'll "play" with Qemm, although Linux is so much fun, I may never need it again. Tom