topic Re: Twin headed B2000 in Operating System - HP-UX

Twin headed B2000

Julian Perry — Fri, 04 Apr 2003 10:38:54 GMT

I have a twin headed B2000.

It's been working with 11.00
for many months, no problems.

Since the upgrade to 11.11 the
second head won't work. The
system sees it, but attempting
to run an Xserver against it
causes Xhp to memory fault.
Xf86 gives an unhelpful error
too.

The built-in head works fine.

The heads are:
- HP VISUALIZE-FXE(0)
1600x1200 @ 75 Hz
- HP VISUALIZE-FX2(2)
1280x1024 @ 75 Hz
and both are recognised by
the system (ioscan).

Any ideas why X may not like
the second head - even if I
try configure single-headed
with only the second head?

Thanks
--
Cheers
Jules.

Re: Twin headed B2000

Alex Glennie — Fri, 04 Apr 2003 13:48:27 GMT

Try changing the resolution ie set both cards to either 1600x1200 @ 75 Hz or 1280x1024 @ 75 Hz

result ?

Is a core file produced ? file core ?

/var/dt/Xerrors ?

graphinfo output & Xserver patch level ?

Is this a SLS or multiheaded configuration, my guess is it MUST be multiheaded since you have 2 different graphics cards right ?

bit short of time today ... try the suggestion/post the details I'll try to come back shortly

Re: Twin headed B2000

Steve Steel — Fri, 04 Apr 2003 14:19:44 GMT

Hi

try remaking the special files

rm /dev/*crt*; insf -evd framebuf

Steve Steel

Re: Twin headed B2000

Stefan Farrelly — Fri, 04 Apr 2003 14:50:19 GMT

Is the famous Julian Perry from England ? if so drop me a line; stefan_farrelly@ipcmedia.com

Re: Twin headed B2000

Julian Perry — Fri, 04 Apr 2003 16:33:07 GMT

Re: Twin headed B2000

Michael Steele_2 — Sat, 05 Apr 2003 15:26:09 GMT

SIGSEGV is a segmentation violation caused by a program trying to access memory outside of it's allocated memory, probably caused by a bad patch, like a lib patch. I'd consider backing out something from 11.11, running tusc.

You can also try modifying kernel parameters, especially if there's a 32 bit upgrade to 64 bit. Here are some suggestions:

maxfiles
massiz
maxdsiz
maxtsiz

Re: Twin headed B2000

Alex Glennie — Mon, 07 Apr 2003 07:40:54 GMT

sounds like X is toast, don't use xf86 unless you have the new firegl cards installed.

No graphinfo ? this should come with the TCOE install for workstations ....

I'd suggest you check with ioscan the h/w (graphics cards ) ensure the appropriate drivers are installed in the kernel ie usb, and graph3, if that all checks out ... dig out the install media and try again .... let us know how you get on.

Re: Twin headed B2000

Rick Beldin — Mon, 07 Apr 2003 11:01:11 GMT

First, Xf86 is only valid if your have the FireGL graphics on PA, which you don't have. Your Xserver should be started by running X, which is a wrapper, which reads the file /etc/X11/Xstart. Xstart should have an entry that indicates which Xserver to start on the screen. The Xserver man page has information about this technique and also states:

Care should be taken if adding entries to the Xstart file by hand.
There should never be more than a single entry for any given display
connection number. If multiple lines exist for a given display
connection then unpredictable results might occur.

I don't believe that you CAN mix FXE/5/10 and the FX2/4/6 graphics cards in the same Xserver configuration. They use different forms of locking.

The following engineering note isn't completely clear on the FXE issue but I believe you cannot mix the FXE with an FX2 graphics:

PROBLEM

Are the Visualize FX5 and FX2 cards compatible in multi-screen mode?

CONFIGURATION

Operating System - HP-UX
Version - 10.20
Hardware System - HP9000
Series - C3600
Subsystem - VISUALIZE FX5/FX10

RESOLUTION

No, the FX5 and FX2 cards are not compatible in multi-screen mode.

Both the VISUALIZE-fx5/10 and the VISUALIZE-fx2/4/6 families use
a hardware synchronization mechanism called implicit locking.
This is a new kernel-based semaphore mechanism that shares the
graphics device between multiple X and 3D processes without
incurring a high performance hit. Multi-screen configurations are
not supported between the VISUALIZE-fx5/10 and VISUALIZE-fx2/4/6
cards because the algorithm cannot handle both fx5/10 and fx2/4/6
devices at the same time.

However, multi-screen configurations are supported between the
VISUALIZE-fxe and VISUALIZE-fx5/10 cards because the fxe device
does not use implicit locking.