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per
Joined: Tue Feb 02, 2010 8:47 am Posts: 44
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 USB Problems
In addition to the power issue with the USB ports I also have the following problems:
When the computer is running and I plug in an external HD the fit-PC2 recognizes it only sometimes. The same goes for other USB devices. When not regognized I have to power the computer down, plug in the USB device, and then start up again. Not an ideal situation.
Last week I bought a A4Tech cordless keyboard/mouse with a 2.4GK USB dongle. It installed nicely and they both work really well - but only for about 3 minutes. Then both the keyboard and the mouse stop to function. If the computer screen has gone into power save and I switch on and move the mouse after some time they again work - but only for about 3 minutes.
I have now connected the keyboard and mouse to my HP laptop and they have been working non stop for over an hour, so I can only assume this is a fit-PC2 USB problem.
There are no acceptable workarounds that I can think of for both these problems so a solution would be most appreciated.
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| Thu Mar 04, 2010 9:00 pm |
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irads
Site Admin
Joined: Mon Mar 16, 2009 2:11 pm Posts: 1941
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 Re: USB Problems
Try disabling C-States in BIOS. Set to GV3 only.
_________________ ------------------------- Irad Stavi fit-PC forum admin -------------------------
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| Mon Mar 08, 2010 11:06 am |
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per
Joined: Tue Feb 02, 2010 8:47 am Posts: 44
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 Re: USB Problems
It is already set to GV3 Only. In fact as far as I am aware everything is at default except LCD clock which had to be changed with the latest bios.
These are my settings:
Hyperthreading = Enabled Processor full speed = GV3 Only No Execute Mode mem protection = Enabled Intel virtualization = Disabled
Audio = Auto SDIO = Enabled Gigabit LAN = Enabled LAN PXE BOOT = Disabled
Graphic mem size = 256MB
CPU speed = 1600 MHz FSB frequency = 100% LCD clock = Enabled Spread spectrum = Off Watchdog timer = Off
Compulab, please publish a description of all bios settings.
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| Mon Mar 08, 2010 12:27 pm |
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irads
Site Admin
Joined: Mon Mar 16, 2009 2:11 pm Posts: 1941
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 Re: USB Problems
Hard disk issue is most likely due to insufficient power through USB. Try connecting with a double USB cable.
The wireless keyboard - maybe the problem is RF interference, see if disabling WiFi and connecting the dongle away from the DVI connector, or better yet through USB extension cable improves the behavior.
BIOS options are explained within BIOS setup utility and summarized in owner's manual.
_________________ ------------------------- Irad Stavi fit-PC forum admin -------------------------
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| Tue Mar 09, 2010 8:22 am |
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per
Joined: Tue Feb 02, 2010 8:47 am Posts: 44
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 Re: USB Problems
The keyboard works with the dongle a bit further away.
The HD is still a problem. When I connect directly on the fit-PC2 it works most of the time now, but with a USB hub (unpowered) it never seems to work. I have tried 3 different 4 port hubs. The hubs and HD combinations work fine on my two netbooks ( and HP Pavilion dm1, and an Acer).
Will this be fixed in a future bios or do I just have to accept it as it is?
All the best, Per
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| Thu Aug 12, 2010 3:48 pm |
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irads
Site Admin
Joined: Mon Mar 16, 2009 2:11 pm Posts: 1941
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 Re: USB Problems
Other computers usually provide more current through USB than the 0.5A specified by the standard. Most hard-disks require up to 1A.
There is no plan to change design of fit-PC2 to provide more power through USB.
_________________ ------------------------- Irad Stavi fit-PC forum admin -------------------------
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| Fri Aug 13, 2010 8:15 pm |
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per
Joined: Tue Feb 02, 2010 8:47 am Posts: 44
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 Re: USB Problems
I was being stubborn and wanted it to work without a powered hub.
Got a powered hub yesterday and it works fine now, I can even have two 500GB portable drives connected at the same time.
The amps might be a good idea to document with the fit-PC2 more clearly as it is very common to have large USB powered 2.5 inch drives. Perhaps even state in the manual that those type of drived typically draw more than the specified 0.5A. Just a thought.
Cheers, Per
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| Sat Aug 14, 2010 12:36 pm |
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shestero
Joined: Wed May 04, 2011 7:30 pm Posts: 10
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 USB overload
irads wrote: Other computers usually provide more current through USB than the 0.5A specified by the standard. Most hard-disks require up to 1A.... If the current eventually will up to 1A, wouldn't it damage the port in fit-PC2 ?? 
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| Wed May 04, 2011 7:53 pm |
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irads
Site Admin
Joined: Mon Mar 16, 2009 2:11 pm Posts: 1941
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 Re: USB Problems
USB in fit-PC2 has a current limiter, this should prevent damage to fit-PC2.
_________________ ------------------------- Irad Stavi fit-PC forum admin -------------------------
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| Fri May 06, 2011 9:06 pm |
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shestero
Joined: Wed May 04, 2011 7:30 pm Posts: 10
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 Re: USB Problems
thank you!
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| Sun May 08, 2011 12:22 pm |
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