Hi Takashi, I believe that we have achieved success! Blacklisting both the r592 and r852 modules appears to have fixed the problem. I have now been running your 3.16.7-1.g632515b-desktop kernel for 3 days with these two modules blacklisted and I have not seen any unusual or excessive logging at all. With this configuration, everything seems to be back to normal. As an FYI, I have not disabled DMA for the r592 and r852 modules; only blacklisted them. I noticed that you posted an updated kernel on November 27 which I did install. Did that update contain anything special or significant regarding this problem? Also, do you recommend that I stay on your kernel/repo or should I revert back to the stock kernel at some point? Please advise. Thank you very much for your help and assistance. Gordon