Red Hat Bugzilla – Bug 58358
Installer 'Giving up.' after "No coprocessor found..."
Last modified: 2007-04-18 12:39:00 EDT
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Description of problem:
CPU: Intel 486 SX stepping 03
No coprocessor found and no math emulation present.
The above lines reported while loading vmlinuz are the last three of any
attempt to boot a 486sx with 20meg internal memory from floppies with either
the boot.img or bootnet.img of Redhat 7.2.
The system is currently running Redhat 7.0 fine, and was targeted to be
upgraded to 7.2.
Neither any of the 'linux dd' 'expert' 'lowres' etc. result in anything else..
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Insert boot disk with boot.img or bootnet.img
2. Switch on system, and select any of the options, or <RETURN>
3. vmlinuz loading stops with reported lines
Actual Results: System is stalled with reported lines.
Expected Results: System boots into installation/upgrade cycle.
Hardware: Compaq Prolinea 4/33S
The reported message and boot result, means the kernel (vmlinuz) on the boot
disk are not configured for Math Unit Emulation. They therefor do not support
386/486 sx systems. (As stated on the Redhat site, the supported systems are
those of the last two years). Probably the boot images are build to
support '586' and up processors, likely part of the new kernel used.
Obviously FPU emulation support is not included in RH 7.2.
Unfortunatly there's no information on the CD-Rom or Redhat website on this
matter, either on how to install 7.2 on SX systems (386/486) or how to obtain a
boot-disk that _does_ support these nonFPU's.
As far as I can see the only solution to this is to build a kernel WITh FPU
emulation support, for which you need another Redhat 7.2 system running...
Correct me if I'm wrong...
The minimum supported machine for an install is a machine with a math
coprocessor and 32 megs of RAM. The post-install i386 kernel will work fine
without a math coprocessor, but just not the install kernel. If you wish to
install this machine, you can take out the hard drive and attach it on another
machine and install there. There is, unfortunately, not enough room on the boot
disk to have a kernel with math coprocessor support and all of the other things
In the future, would it be possible to have 2.88Mb boot floppies?
Of course, only a few have these drives, but one can have a bootable
CDROM with an El Torido 2.88Mb floppy image.