Date: Mon, 10 May 1999 02:40:03 -0700 (PDT) From: Warren Toomey <wkt@henry.cs.adfa.edu.au> To: freebsd-bugs@FreeBSD.org Subject: Re: i386/11575: sio.c silo overflows during X usage Message-ID: <199905100940.CAA99743@freefall.freebsd.org>
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The following reply was made to PR i386/11575; it has been noted by GNATS.
From: Warren Toomey <wkt@henry.cs.adfa.edu.au>
To: freebsd-gnats-submit@freebsd.org
Cc:
Subject: Re: i386/11575: sio.c silo overflows during X usage
Date: Mon, 10 May 1999 19:36:47 +1000 (EST)
I have found a workaround to this problem. I have a 3DImage975 AGP video
card, and I'm using the XFree86 3.3.3.1 SVGA X server which has acceleration
for this card. If I disable this acceleration, there are no sio.c silo
overflows in FreeBSD-3.1-STABLE.
Relevant kernel dmesgs and X server output when running with no acceleration:
vga0: <Trident model 9750 VGA-compatible display device> rev 0xf3 int a
irq 12 on pci1.1.0
vga0 at 0x3b0-0x3df maddr 0xa0000 msize 131072 on isa
XFree86 Version 3.3.3.1 / X Window System
(protocol Version 11, revision 0, vendor release 6300)
Release Date: December 29 1998
Operating System: FreeBSD 3.0-CURRENT i386 [ELF]
Configured drivers:
SVGA: server for SVGA graphics adaptors (Patchlevel 0):
tvga8200lx, tvga8800cs, tvga8900b, tvga8900c, tvga8900cl, tvga8900d,
tvga9000, tvga9000i, tvga9100b, tvga9200cxr, tgui9400cxi, tgui9420,
tgui9420dgi, tgui9430dgi, tgui9440agi, cyber9320, tgui9660, tgui9680,
tgui9682, tgui9685, cyber9382, cyber9385, cyber9388, cyber9397,
cyber9520, 3dimage975, 3dimage985, generic
Using syscons driver with X support (version 2.0)
(using VT number 4)
XF86Config: /etc/XF86Config
(--) Trident chipset version: 0xf3 (3DImage975)
(--) SVGA: Revision 0.
(--) SVGA: TV interface is NTSC
(--) SVGA: DAC is enabled for TV
(--) SVGA: VGA display is connected.
(--) SVGA: Using Trident programmable clocks
(--) SVGA: chipset: 3dimage975
(--) SVGA: videoram: 4096k
(**) SVGA: Option "noaccel"
(**) SVGA: Using 16 bpp, Depth 16, Color weight: 565
(--) SVGA: Maximum allowed dot-clock: 230.000 MHz
(**) SVGA: Mode "1024x768": mode clock = 65.000
(**) SVGA: Mode "800x600": mode clock = 50.000
(**) SVGA: Mode "640x480": mode clock = 36.000
(--) SVGA: Virtual resolution set to 1024x768
(--) SVGA: Using Linear Frame Buffer at 0x0d8000000, Size 4MB
(**) SVGA: Disabled Graphics Engine.
so perhaps something in the acceleration code is causing silo overflows.
Perhaps it's because the use of the AGP bus locks out interrupts from
the UART? I haven't had any mouse problems, tho.
Thanks,
Warren
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