Bug 36457 - NMI's with XFree86-4.0.3 when used with Mach64 CX
NMI's with XFree86-4.0.3 when used with Mach64 CX
Status: CLOSED WONTFIX
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
7.1
i386 Linux
medium Severity medium
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Assigned To: Michael K. Johnson
David Lawrence
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2001-04-18 08:42 EDT by Pekka Pietikäinen
Modified: 2007-04-18 12:32 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2003-06-09 11:41:08 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Pekka Pietikäinen 2001-04-18 08:42:56 EDT
After trying to run X on a machine I started having short hangs where
the cursor vanished for a while. Looking at my dmesg I spotted the
following:

Uhhuh. NMI received. Dazed and confused, but trying to continue
You probably have a hardware problem with your RAM chips
NMI: IOCK error (debug interrupt?)
CPU:    1
EIP:    0023:[<085273e9>]
EFLAGS: 00003212
eax: 085ab9b0   ebx: 402271e4   ecx: 00000018   edx: d8d8d8d8
esi: d8d8d8d8   edi: 00000000   ebp: bffff2c8   esp: bffff240
ds: 002b   es: 002b   ss: 002b
Process X (pid: 952, stackpage=c40f7000)

With XFree86 3.3.6 everything is fine -> might be best to just make
Xconfigurator
use 3.3.6 with this chip.

Here's the details of the board:

00:13.0 VGA compatible controller: ATI Technologies Inc 210888CX [Mach64
CX] (rev 01) (prog-if 00 [VGA])
00:13.0 Class 0300: 1002:4358 (rev 01)
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping+ SERR- FastB2B-
	Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
	Region 0: Memory at fe000000 (32-bit, non-prefetchable) [size=8M]
	Expansion ROM at febf0000 [disabled] [size=64K]

In a related problem, XFree only supports 8bpp on this chip, and the
installer 
apparently tries to use 16. Probably not worth special-casing old chips
like
this in anaconda, though.
Comment 1 Mike A. Harris 2001-04-18 13:42:13 EDT
NMI sounds kernel related to me.. reassigning.
Comment 2 Arjan van de Ven 2001-04-18 15:33:29 EDT
NMI is just a message from your hardware saying "Oh shit".
it's the kernel that catches it and prints it.... nothing more
Comment 3 Sammy 2001-04-19 09:52:08 EDT
I had the same problem year and a half ago. It was something trivial but I can't
remember exactly....it could be one of the options in XF86Config-4 file....I think
there was an option about depth that was changed in 4.0x from 3.3.6...I had
the old form either in the config file or as an option to X in /etc/X11/xdm/Xservers
file. The depth should be described by an option like  "Depth  16" in the Display
subsection.
Comment 4 Alan Cox 2003-06-09 11:41:08 EDT
hardware or xserver config

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