64 bit toshiba ubuntu xx.xx wireless slow and/or dropping out
 

Hello.

comcast DHCP internet:
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dual boot using: Ubuntu · Lucid (10.04); & Windows 7 Home Premium;
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Toshiba A305-S6916 (Originally w/Vista): Processor: Intel(R) Core(TM)2 Duo CPU T6400 @ 2.00 GH & RAM: 4.00 GB;
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HCL: searching as either A305-S6916 or a305-s6916, NOT in, on list;
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Ubuntu OS Description:
Linux rebus-laptop 2.6.32-24-generic #39-Ubuntu SMP Wed Jul 28
Two Intel Unknown 1200MHz processors, 7980.11 total bogomips, 1015M RAM
System library 2.11.1;
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ms info:
OS Manufacturer Microsoft Corporation
OS Name Microsoft Windows 7 Home Premium
Version 6.1.7601 Service Pack 1 Build 7601
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BIOS info:
System Name REBUS-PC
System Manufacturer TOSHIBA
System Model Satellite A305
System Type x64-based PC
Processor Intel(R) Core(TM)2 Duo CPU T6400 @ 2.00GHz, 2000 Mhz, 2 Core(s), 2 Logical Processor(s)
BIOS Version/Date INSYDE 1.90, 3/20/2009
SMBIOS Version 2.4
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "6.1.7601.17514"
User Name Rebus-PC\Rebus
Time Zone xxx Daylight Time
Installed Physical Memory (RAM) 4.00 GB
Total Physical Memory 4.00 GB
Available Physical Memory 2.56 GB
Total Virtual Memory 4.25 GB
Available Virtual Memory 2.51 GB
Page File Space 256 MB
Page File C:\pagefile.sys
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Ubuntu 10.04 slow or dropping out (either using Firefox or standalone program(s) which access internet - like Update Manager, etc...);
NOTE: similar to local Wireless Connection Info is it possible to monitor respective, paired Ubuntu port speed? Situation is local wireless speed showing speeds of: Unknown, 1 Mb/s - 54 Mb/s; however, app's like Update Manager showing respective session transfer speeds of: Disconnected, 2 KB/s - 24 KB/s?
Display Adapter: Mobility Radeon HD 3650;
Network Adapters:
Intel(R) WiFi Link 5100 AGN;
microsoft Virtual WiFi Miniport Adapter;
Realtek PCIe FE Family Controller;
also running:
ZoneAlarm Extreme Security version: 10.0.246.000
vsmon version: 10.0.246.000
Driver version: 10.0.217.000
Anti-virus engine version: 8.1.8.79
Anti-virus signature DAT file version: 1058168864
ZoneAlarm Browser Security: 1.5.311.0
ZoneAlarm ForceField Spyware Scanner: 1.5.53.235
ZoneAlarm ForceField Anti-Phishing Database: 1.2.104.0
ZoneAlarm ForceField Spyware Sites Database: 04.155
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loaded off of 'Linux 2011 Edition Bible cd using ubuntu 10.04. 10.04 lts upgrade or random software updates fail due to url(s) timing out.
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when operating, intel wireless works ok.
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googled topic & much conflicting info on subject.
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after many comcast attempts to get me to increase circuit speed and seemingly unexplained general system slow down in both linux and windows environments, I am starting to lean towards one and/or two possible problem areas: one, 64 bit machine & current BIOS somehow not compatible? And/or, two, comcast DHCP circuit is 'some how' throttling back, down my connection? Anyone know how to monitor for, detect such a circumstance?
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LinuxQuestions.org looks like the place to be.
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thanks, Rebus.