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Full Discussion: TTY Insane
Top Forums UNIX for Dummies Questions & Answers TTY Insane Post 302351410 by HawaiiMike on Tuesday 8th of September 2009 12:39:25 PM
Old 09-08-2009
[quote=edfair;302351294]Those happen. The Sun probably was sensitive and your onboard probably couldn't put out enough current to get things transitioned.
How long was the cable? What wire gauge, if you know? Both affect the waveshape of the signal.
Looking at problem serial signals with a scope can show some serious RC degradation of the leading edge of the bits. At the worst I've seen the normal square wave was rounded off so much that the signal never made it to the rail voltage before the transition to the other rail started.

edfair, my setup was Linux -> blackbox mini fiber driver -> 10' fiber strand (one-way serial) ->blackbox mini fiber driver -> Sun. You must be right in your assessment, but it sure didn't seem to make "logical" sense at the time.

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LGE(4)							   BSD Kernel Interfaces Manual 						    LGE(4)

lge -- Level 1 LXT1001 NetCellerator PCI Gigabit Ethernet adapter driver SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file: device miibus device lge Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): if_lge_load="YES" DESCRIPTION
The lge driver provides support for various NICs based on the Level 1 LXT1001 NetCellerator Gigabit Ethernet controller chip. The LXT1001 supports fiber PHYs and also a GMII port for use with 10/100/1000 copper PHYs, however there are currently no NICs on the market that use this feature. The LXT1001 supports TCP/IP checksum offload for receive and VLAN-based filtering as well as a 64-bit multicast hash filter. It also sup- ports jumbo frames, which can be configured via the interface MTU setting. Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility configures the adapter to receive and transmit jumbo frames. Using jumbo frames can greatly improve performance for certain tasks, such as file transfers and data streaming. The lge driver supports the following media types: autoselect Enable autoselection of the media type and options. The user can manually override the autoselected mode by adding media options to rc.conf(5). 1000baseSX Set 1000baseSX operation over fiber optic cable. Both full-duplex and half-duplex modes are supported. The lge driver supports the following media options: full-duplex Force full duplex operation. half-duplex Force half duplex operation. For more information on configuring this device, see ifconfig(8). HARDWARE
Adapters supported by the lge driver include: o SMC TigerCard 1000 (SMC9462SX) o D-Link DGE-500SX DIAGNOSTICS
lge%d: couldn't map memory A fatal initialization error has occurred. lge%d: couldn't map ports A fatal initialization error has occurred. lge%d: couldn't map interrupt A fatal initialization error has occurred. lge%d: no memory for softc struct! The driver failed to allocate memory for per-device instance information during initialization. lge%d: failed to enable memory mapping! The driver failed to initialize PCI shared memory mapping. This might happen if the card is not in a bus-master slot. lge%d: no memory for jumbo buffers! The driver failed to allocate memory for jumbo frames during initialization. lge%d: watchdog timeout The device has stopped responding to the network, or there is a problem with the network connection (cable). SEE ALSO
arp(4), miibus(4), netintro(4), ng_ether(4), ifconfig(8) Level 1 LXT1001 Programming Manual, http://www.FreeBSD.org/~wpaul/Level1/LXT1001SRM.pdf. HISTORY
The lge device driver first appeared in FreeBSD 4.4. AUTHORS
The lge driver was written by Bill Paul <william.paul@windriver.com>. BSD
July 16, 2005 BSD

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