On Tue, Jul 10, 2001 at 09:18:15PM -0500, Andrew Perrin wrote: > I just installed a new, low-end video card in my machine; it's a PCI card > based on the nVidia Riva TNT Vanta chipset. Basically it works fine, with > the very irritating exception of an intermittent flicker of the screen, > more noticeable at high resolutions but existent even in plain text mode. > > What's interesting is this: the flicker seems directly related to activity > on the PCI bus. Every time there's a packet on eth0 (a PCI ethernet > card) according to the hub, the screen flickers. Ditto with hard drive > activity (it's a PCI IDE interface) and activity on eth1 (another PCI > ethernet). Haven't noticed much on the SCSI card, but it's not used much > (CD-ROM and Zip). > > Has anyone seen such a thing? Any advice? > > Information: > Debian 2.2r3 > nujoma:~# uname -a > Linux nujoma 2.2.19pre17 #1 Sat Jun 30 15:49:52 EST 2001 i586 unknown > nujoma:~# lspci -v > 00:00.0 Host bridge: Intel Corporation 430FX - 82437FX TSC [Triton I] (rev > 02) > Flags: bus master, medium devsel, latency 64 > > 00:07.0 ISA bridge: Intel Corporation 82371FB PIIX ISA [Triton I] (rev 02) > Flags: bus master, medium devsel, latency 0 > > 00:0d.0 Ethernet controller: 3Com Corporation 3c590 10BaseT [Vortex] > Flags: bus master, medium devsel, latency 248, IRQ 5 > I/O ports at ff20 > > 00:0e.0 Ethernet controller: Intel Corporation 82557 [Ethernet Pro 100] > (rev 02) > Subsystem: IBM Ethernet Pro 10/100 > Flags: bus master, medium devsel, latency 66, IRQ 9 > Memory at fffbf000 (32-bit, prefetchable) > I/O ports at ff80 > Memory at ffe00000 (32-bit, non-prefetchable) > > 00:0f.0 VGA compatible controller: nVidia Corporation Vanta (rev > 15) (prog-if 00 [VGA]) > Subsystem: VISIONTEK: Unknown device 0014 > Flags: bus master, VGA palette snoop, 66Mhz, medium devsel, > latency 64, IRQ 10 > Memory at fe000000 (32-bit, non-prefetchable) > Memory at fa000000 (32-bit, prefetchable) > Capabilities: [60] Power Management version 1 > > > ---------------------------------------------------------------------- > Andrew J Perrin - [EMAIL PROTECTED] - http://www.unc.edu/~aperrin > Assistant Professor of Sociology, U of North Carolina, Chapel Hill > 269 Hamilton Hall, CB#3210, Chapel Hill, NC 27599-3210 USA >
Hello Andrew,
I'm not too sure I can be of any help. But I do happen to think
you've got you're IDE/PCI bus running at 66 MHz, which may be causing it
to be very unstable if it is only supposed to be running at 33 MHz. The
output of my 'dmesg' has this in it...
ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
and my devices say 32(i think that can be interpreted as 33 MHz) for the
latency...
00:0d.0 Ethernet controller: Lite-On Communications Inc LNE100TX (rev 20)
Subsystem: Netgear FA310TX
Flags: bus master, medium devsel, latency 32, IRQ 3
I/O ports at 9400 [size=256]
Memory at d4800000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=256K]
Do you know if you're bus is supposed to be running at 66 MHz?
Hope that helps,
Jim Richards
Newbie tip:
Want to run a command with exactly the same parameters as it was run
with last time? As long as it's in your history you can do it a couple
ways. You can scroll back to it by holding down the 'up-arrow' key until
you come to it. But, let's say it was 50 commands ago, there's an even
better way. Use the '!' character. Let's say you have the following
command in your history...
find / -user root -perm -4000 -print
Instead of typing that all out again or holding down the up-arrow key
for a minute, just type in...
c243491-a:~# !find
find / -user root -perm -4000 -print
/usr/bin/newgrp
/usr/bin/chfn
(snip)
>
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