Ubuntu Networking :: Philips SNU5600 Disconnects If Uploading Lots Of Data To NAS

I have a Philips SNU5600 wifi dongle. My wifi network isn't particularly strong, but it has always been reliable, even when downloading and uploading large files such as ISOs to the internet.

I recently bought a NAS, and when I run rsync or try and copy a large file (eg 6 gigs) to the NAS, the connection will eventually fail.

The error message in /var/log/debug is:

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I have read elsewhere that this is a problem with the Minstrel algorithm, so I have tried disabling that by creating /etc/modprobe.d/80211.conf with the following line in it:

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And when I reboot, I am able to run "cat /sys/module/mac80211/parameters/ieee80211_default_rc_algo" and the output is "pid".

However, in my /var/log/debug, there is still the line:

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Here is the output from a few other commands for extra information:


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- The problem has only been around since I got the NAS, and only happens when copying files TO the NAS. Downloading/uploading to internet doesn't cause the same problem.
- This problem happens on two machines both with the same wifi dongle.
- This problem doesn't happen on a laptop running the Intel iwl3945 driver, nor with machines connected via cables, so it is not the NAS which is at fault.

How to get a stable connection when backing up?