Random Sig'11 in XF864 with kernel > 2.2.x

Random Sig'11 in XF864 with kernel > 2.2.x

[Jeffrey Ingber]

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Hello kernel developers:

I'm experiencing random Signal 11's on kernels in the 2.4 series with
XFree86 4 and SMP configurations.  Here a some threads to the XFree86
mailing lists which suggest that the Signal 11's are kernel related. 
Downgrading to a 2.2 series kernel solves these problems:

http://www.xfree86.org/pipermail/xpert/2001-September/011053.html
http://www.xfree86.org/pipermail/xpert/2001-September/011229.html


Here's a snippet from my posting to the list:  

----
> Dell PowerEdge 6300 (Quad Xeon 500) with ATI Rage 128
> IBM Netfinity 5600 (Dual PIII 667) with Matrox MMS Quad Monitor
> Tyan Tunderbolt S1873UANG-R (Dual PIII 600) with Matrox Marvel G400

   I'll bet it goes away if you don't use a 2.4 SMP kernel.
That is, use a 2.4 UP kernel or a 2.2 UP/SMP kernel.
---

And this turned out to be the case.  Is there anything that I could do
help fix this?  Is there anyone else on this list that has had similar
problems and has overcome this?


Thanks for listening.
Jeffrey H. Ingber (jhingber _at_ ix.netcom.com)



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Re: Random Sig'11 in XF864 with kernel > 2.2.x

[Frank Schneider]

Jeffrey Ingber schrieb:
> 
> Hello kernel developers:
> 
> I'm experiencing random Signal 11's on kernels in the 2.4 series with
> XFree86 4 and SMP configurations.  Here a some threads to the XFree86
> mailing lists which suggest that the Signal 11's are kernel related.
> Downgrading to a 2.2 series kernel solves these problems:
> 
> http://www.xfree86.org/pipermail/xpert/2001-September/011053.html
> http://www.xfree86.org/pipermail/xpert/2001-September/011229.html
> 
> Here's a snippet from my posting to the list:
> 
> ----
> > Dell PowerEdge 6300 (Quad Xeon 500) with ATI Rage 128
> > IBM Netfinity 5600 (Dual PIII 667) with Matrox MMS Quad Monitor
> > Tyan Tunderbolt S1873UANG-R (Dual PIII 600) with Matrox Marvel G400
> 
>    I'll bet it goes away if you don't use a 2.4 SMP kernel.
> That is, use a 2.4 UP kernel or a 2.2 UP/SMP kernel.
> ---
> 
> And this turned out to be the case.  Is there anything that I could do
> help fix this?  Is there anyone else on this list that has had similar
> problems and has overcome this?
> 

Hello..

I can only admit that i also know this problem.

I run a RH7.1 on a dual-PIII/850 with a Matrox G400/16MB, and i also had
several crashes of X, mostly when Netscape runs, but some without it.

What i did:
I changed the default colourdepth from 24 to 16 and i got the "original"
mga.o-modules from www.matrox.com.

But this did not help, i suffered a crash some days ago again, but this
time i had a logentry, it said:

---------
Sep 12 13:14:27 falcon kernel: [drm] Process 850 dead (ctx 1, d_s =
0x00)
---------

I run XFree 4.0.3 and have enabled the Matrox-Options in the Kernel
under "Character devices - Support for Matrox g200/g400", but this did
not help either.

Another problem i got by using the modules from "matrox.com", i cannot
switch between consoles and X anymore, if i switch back to X several
times (one time usually is ok), the whole machine crashes, i have to
reboot via SysRq and even that does not work everytime. But this is
related to the "mga.o"-module from matrox, i hadnt this effect with the
mga.o from XFree86.

Solong..
Frank.

--
Frank Schneider, <SPATZ1@T-ONLINE.DE>.                           
Microsoft isn't the answer.
Microsoft is the question, and the answer is NO.
... -.-

Re: Random Sig'11 in XF864 with kernel > 2.2.x

[Jeffrey Ingber]

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Thanks for your feedback!

Just to make some clarifications:

The random Sig 11's are observed in the stock XFree86 4.x drivers with
none of the 'extras' enabled, such as DRI on several sets of video cards
(Matrox and ATI).  I can run both UP and SMP kernels in the 2.2 series
and 2.4 UP kernels with unlimited uptimes.  However, switching to a 2.4
SMP kernel will cause random Sig 11's in X, seemingly irregardless of
video card/vendor. 

The systems are all stock hardware as well as the distros (excluding
errata).  It's difficult to ascertain information on this problem due to
the 'randomness' of the crashes.  I don't have to do anything unusual to
cause this crash:  Just install a recent distro on an SMP machine, stare
at the screen, and X will eventually crash.

I'm not totally convinced that this is a kernel problem, but it seems
that only a handful of people seem to be aware of this.  (This has been
going on for well over a year, around the time of the mid-2.3 kernels). 
The fact that a 2.4 kernel seems to be catalyst lends some creedence to
this theory.

Jeffrey H. Ingber (jhingber _at_ ix.netcom.com)


> 
> On Sat, 2001-09-15 at 06:24, Frank Schneider wrote:
> > Jeffrey Ingber schrieb:
> > > 
> > > Hello kernel developers:
> > > 
> > > I'm experiencing random Signal 11's on kernels in the 2.4 series with
> > > XFree86 4 and SMP configurations.  Here a some threads to the XFree86
> > > mailing lists which suggest that the Signal 11's are kernel related.
> > > Downgrading to a 2.2 series kernel solves these problems:
> > > 
> > > http://www.xfree86.org/pipermail/xpert/2001-September/011053.html
> > > http://www.xfree86.org/pipermail/xpert/2001-September/011229.html
> > > 
> > > Here's a snippet from my posting to the list:
> > > 
> > > ----
> > > > Dell PowerEdge 6300 (Quad Xeon 500) with ATI Rage 128
> > > > IBM Netfinity 5600 (Dual PIII 667) with Matrox MMS Quad Monitor
> > > > Tyan Tunderbolt S1873UANG-R (Dual PIII 600) with Matrox Marvel G400
> > > 
> > >    I'll bet it goes away if you don't use a 2.4 SMP kernel.
> > > That is, use a 2.4 UP kernel or a 2.2 UP/SMP kernel.
> > > ---
> > > 
> > > And this turned out to be the case.  Is there anything that I could do
> > > help fix this?  Is there anyone else on this list that has had similar
> > > problems and has overcome this?
> > > 
> > 
> > Hello..
> > 
> > I can only admit that i also know this problem.
> > 
> > I run a RH7.1 on a dual-PIII/850 with a Matrox G400/16MB, and i also had
> > several crashes of X, mostly when Netscape runs, but some without it.
> > 
> > What i did:
> > I changed the default colourdepth from 24 to 16 and i got the "original"
> > mga.o-modules from www.matrox.com.
> > 
> > But this did not help, i suffered a crash some days ago again, but this
> > time i had a logentry, it said:
> > 
> > ---------
> > Sep 12 13:14:27 falcon kernel: [drm] Process 850 dead (ctx 1, d_s =
> > 0x00)
> > ---------
> > 
> > I run XFree 4.0.3 and have enabled the Matrox-Options in the Kernel
> > under "Character devices - Support for Matrox g200/g400", but this did
> > not help either.
> > 
> > Another problem i got by using the modules from "matrox.com", i cannot
> > switch between consoles and X anymore, if i switch back to X several
> > times (one time usually is ok), the whole machine crashes, i have to
> > reboot via SysRq and even that does not work everytime. But this is
> > related to the "mga.o"-module from matrox, i hadnt this effect with the
> > mga.o from XFree86.
> > 
> > Solong..
> > Frank.
> > 
> > --
> > Frank Schneider, <SPATZ1@T-ONLINE.DE>.                           
> > Microsoft isn't the answer.
> > Microsoft is the question, and the answer is NO.
> > ... -.-
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at  http://www.tux.org/lkml/
> 


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Re: Random Sig'11 in XF864 with kernel > 2.2.x

[Alan Cox]

> The random Sig 11's are observed in the stock XFree86 4.x drivers with
> none of the 'extras' enabled, such as DRI on several sets of video cards
> (Matrox and ATI).  I can run both UP and SMP kernels in the 2.2 series
> and 2.4 UP kernels with unlimited uptimes.  However, switching to a 2.4
> SMP kernel will cause random Sig 11's in X, seemingly irregardless of
> video card/vendor.=20

I'm aware of the reports. Its very hard to figure out what might be
involved. Later 2.4 kernels we have fixed the odd possible candidate where
segment registers or LDT propogation on SMP might go awry but nothing that
really explains the X11 ones and whether they are PCI/AGP setup , power
management or kernel bug triggered

Alan