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Old 09-16-2008, 01:47 AM   #1
dav290948
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Thumbdrive Heats PC


I'm running PCLinuxOS on a Gigabyte GA-K8VM800M (rev. 2.0) mainboard, AMD Athlon 64 3000 CPU, 1GB DDR400, 80GB 7200 Seagate HDD, dual-booted with 98SE (for ISP reasons - must have Windows or Mac).

Last week I bought a Transcend JF V30 4GB Flashdrive.

Inserting this device into a USB2 port on front or rear (in case they have different board circuits) of the PC causes the PC temp to rise - without doing anything else on Linux side. From 35C at idle, over several minutes the temp rises to 46-47C and stays there.

If I transfer data either way just after inserting the device - of course, the temp goes up more quickly. (As when using one of my 4 x USB2 XHDs - which don't have this odd heating behaviour otherwise.)

If I just insert the Flashdrive (when idle temp is 35C) - don't even open it on Desktop - then "Remove Safely" at 40-41C - over the next 5-6 minutes the temp goes up to 46-47C - stays there.

I've tried running Top and KSysGuard - neither shows any runaway or "odd" process. I also tried having both Top or KSysGuard running open - and then inserting the Flashdrive, to see what then started to run. Nothing that I could see.

The PCLOS System is seeing the Board's USB ports as USB-2.0, not as USB-1.1.

With the 98SE Drivers from Transcend's Site installed on 98SE side - the Flashdrive behaves normally. That is - no temp rise when inserted, but not used. Expected temp rise to mid-40sC while transferring data either way - but rapid drop to the 35C idle after stopping data transfer - but with device still inserted. Or - "Safely Remove" with the temp still over 40C after transferring data - and the temp drops as expected.

The PC is set up to spend hours encoding MPEG2 movies to Xvid4 video - 550W P/S with 120mm scavenger fan and 80mm extractor fan, plus additional 1 x 80mm and 1 x 120mm case fans. The PC can encode video at 100% CPU for hours, without overheating. Coming into Sydney summer, I recently pulled the CPU, cleaned and reapplied the Arctic Silver, and cleaned / checked the CPU fan.

(I was a 7-Cert Windows Tech for 11 years, so I'm quite familiar with hardware.)

> Neither PCLOS Main Forum or the associated Forum has an answer for this one - and Google seems not to, either.

I'd be most grateful for a fix, or info on where to look further, or anything related.

Best Regards, Dave.
 
Old 09-16-2008, 02:48 PM   #2
hollywoodb
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I'm not sure what would cause that, but you could also try runing powertop and watching it while you use the flash drive under linux.

I've never seen a linux system do that, does plugging in other flash drives cause the same rise in temperature?
 
Old 09-16-2008, 04:34 PM   #3
dav290948
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Hollywoodb - Thanks for your attention. Flashdrives are quite expensive here in Australia, and I'm on disability, so that's the first one I've had.

My godson and his family were over here last night, and brought some Flashdrives - 256MB, 512MB, 1GB - of different brands, to try. All do the same thing.


> Powertop as listed in Synaptic seems to be a utility to check power usage in laptops. This is a PC - can I still use it in some way?

Regards, Dave.
 
Old 09-16-2008, 11:24 PM   #4
hollywoodb
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powertop in theory should still be able to detect what's causing the most power usage on your PC, hopefully indicating why it's warming up when you plug the drive in... It's a shot in the dark, but a shot nonetheless
 
Old 09-17-2008, 12:07 AM   #5
David the H.
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Sounds like it could be a bug in either the kernel's usb subsystems, or in that particular stick/brand of stick. It would probably be a good idea to file a kernel bug report on it.
 
Old 09-17-2008, 02:28 AM   #6
dav290948
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Dave_the_H - Thanks - I've tried other Flashdrives I borrowed - they do the same thing.

PCLOS has a later kernel than the one I'm using - I'll try that. Thanks for the info.

Regards, Dave.
 
  


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