but I think is not marvell issue

it is unbuntu power mangement behavior

you could look below post, it since someone used ubuntu system also facing same issue

http://askubuntu.com/questions/2388/screen-power-management-during-media-use

So... this is mean it work or it not work?

I think system into idle state is base on user setting at ubuntu system , do you used I post method to trun off power mangment and screen saving than give a try

I nou used MPD before

could you let me know your used case through network, local ... due to mpd is a dameon so if you play at local whcih player play it

BTW prevent it I think you could tuen off SCreen Saver at System->SCreen Saver and some monitor setting at power mangiment at System->power mangerment

another thing you need to check is when you play vedio (for exapmle type totem <vedio name> at consloe or x-terminal), you could see some word like "vmeta" at console , you have this word mean you have get hardware accerlate

if used totem still bad, could you share your test vedio clip for me

I list what we do here, maybe it could help you

first all , I try more time at oprofile 0.95 version, not 0.97 , 0.97 is my base 0.95 modify than porting to 0.97, so if possible ,try 0.95 version first

I perform below command at console, sometimes I have see opreport show up can't find sample file, than I re-test 1-2 times , it will back to normal

sudo opcontrol --init  //if you second test you could used reset
sudo opcontrol --setup --no-vmlinux --event=CYCLE_COUNT:20000000
sudo opcontrol --start --session-dir=/home/ubuntu/<my save log folder>

export DISPLAY=:0.0 //if you used xtermal (I not give a try) , you don't type this
totem <vedio clip name> & //totem running at backgroud, await a while (almost 1 -2 min) ,this is my case, maybe not need to wait so long

sudo opcontrol --stop

opreport --session-dir=/home/ubuntu/<my save log folder>

BTW, do you used totem to play vedio ,toem has pre-install at rootfs , others player maybe not get VPU/GPU accelerate

I think you start / stop too short

for my case, after start ,  perform cp cammand to copy vedio file, used toem to play vedio

after these than type stop, and used opreport , I could see some data

BTW , if your log save loaction , you don't have permession , also have problem , if this way ,try to used "--session-dir" parameter to chang record and report path
 

I hve try 1080P resolution

but I think something need to be clarify

1.as I remember ,I have discuss about this at another thread , I think need to make sure , you used latest rootfs,kernel form this (http://www.plugcomputer.org/downloads/d2plug/index.html)download page

2.there are too many vedio format at world , I didn't try too many format , so maybe you  used fomat , I not give a try

3. if you put vedio source at SD card , as I know SD card has class 6 and class 10 , used class 10 will be better

4. your blocky mean is ... , I mean this is sometimes, very often or hard to see it ?

not need to rebuild kernel

you need to rebuild your usb wifi module source

due to this source need some header form kernel , so when you rebuild your usb wifi modules need to point out which kernel source loacte

this is why I suggest you build it at host PC ,

due to need to modify your usb wifi modules Make file and this is for business used, I think you could ask your wifi module vendor help

Sorry, I don't have your usb wifi card on hand , so I can't give a try

but could I know why you can't used build-in wifi modules

BTW base on your error message , under the "/lib/modules/<kernel version>/build" is kernel source

so I think you are not install fail ,it should be build module fail when it try to find kernel,

I think you could do this by below two way

1.copy kernel source to below message mention folder and re-build it
2.build it at host(x86) device , used cross_compiler( you could find it at http://www.plugcomputer.org/downloads/d2plug/index.html) and
   modify your usb module make file , to let it to find your d2plug kernel source at host PC, than re-build it

I use D2Plug play vedio , it look like smoothly , I play H264 format vedio, I not see any problem here

I think you not add Marvell PJ4 event at opfrofile source

I have done it for you , attach zip file contain two version oprofile patch , one is for 0.9.5 another is for 0.9.7 , I think you uncompress it see the file name will know it

I also list how to make it for your reference

follow the procedure to build that
   $> sudo apt-get install gcc-4.1 cpp-4.1 g++-4.1
   $> sudo apt-get install libpopt-dev binutils-dev
   $> cd <oprofile folder>
   $> CC=gcc-4.1 CPP=cpp-4.1 CXX=g++-4.1 ./configure --with-kernel-support
   $> make
   $> sudo make install
   $> sudo opcontrol --init
   $> ophelp

But I still suggest ,you could connect with USB-flash ,SD card , or hard-disk through eSATA to test it

this way could know even there are flooding message as you see ,the real function work normal or not

I assume you connect to usb flash-disk or harddisk through e-Sata

Do you mean these device not working or has some problem

if not , I think it just a information from kernel

not relate to your file-system