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turbosupramk3 wrote: I'm sorry if this is the wrong forum
Maunder wont create a specific Kernel forum so it is unsurprising you dont know where to post. 
Anyway, windbg, you cant install it on the machine you are debugging. You HAVE to use a second machine and install it on that. You then connect the two machines physcally with a cable. 1394 is best but COM port too with a NULL modem cable. (Look at the docs, you have to do some fiddling with the 1394 driver some times). You then need to configvure the target to boot into debug mode. XP and 2K you do it in boot.ini, in Vista and later you do it in system config.
You then start windbg in the second machine and select debug=>kernel=> and select 1394 or COM and then boot the target into debug mode. You can then break the target, look at processes, thread stalls and so on. Not easy to do since you need to look at thread times and so on, BUT a big clue is to look at the kernel stack during the hang. If it stays the same during the hang then it look at the driver near the top and what it is calling. (Get your symbols set up, use the microsoft public symbol server, again, look in the documentaiton of windbg at 'symsrv'.
If the kernel itself isnt hung then it is normally a crss.exe process hang. This often gives a 'black screen' hang. Or a istuation where the mouse can move but the keyboard is inactive. Windbg help has some good tips on debugging hangs, both kernel and user mode.
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Nothing to say.
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Hi,
Thanks for the reply. My screen will usually hang when the screen saver is rotating, only a few times has it hung when I am using the machine actively. It does not peg the CPU, it just calmly sits there frozen.
I really would like to do a local dump, and not try and have a second laptop sitting there if I can. My laptop does not have a firewire cable, it does have virtual coms with usb. I see that Microsoft has a local option and I would like to just dump the stack to a file when it freezes, is this not possible?
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If it freezes, how are you going to trigger the dump??
Chances are good that if the machine froze you're not going to get a dump.
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This is my first time working with windbg, but I was hoping that it kept a running queue of what was in memory, and I could figure it out that way.
How do people solve random freezing issues if this won't work? I tried perfmon, but didn't see anything conclusive.
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turbosupramk3 wrote: How do people solve random freezing issues if this won't work?
By hooking up the debugger from a seperate machine.
You DID read the help files and sample debugging sessions in, well, Help, didn't you??
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Yes I did, it says the instructions are not for local debugging but for host/target debugging.
They have a local option, this is the option I would like to pursue.
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Youc CANT use the local o;ption to debug the machine. You HAVE to use remote debugging.Period.
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Nothing to say.
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How can a machine that is frozen in the kernel runa user mode app?
Also csrss hangs also lock the UI. How can you manipulate an app with no UI?
You HAVE to use a second machine.
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Nothing to say.
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Ah, do you have power off to the USB devices when the screen saver kicks in?
You can disable power saving on the various host controlers in Device manager, try that.
You can also debug using the USB com ports by the way.
And no, you canot locally debug the kernel. Period. You have to use a second machine.
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Nothing to say.
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I'll have to find another machine then I guess, what other choice do I have
Do you know of a tutorial on the cabling? Or can I just use a standard female to female usb cable between two machines to do this? My machine does not power off usb devices at any point.
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Did you say you have USB to COM port adapters? If so then get a second machine, the host, with a COM port, and debug the target machine with a NULL modem cable attatched to its USB to COM adaper https://www.google.co.uk/search?hl=en&gs_nf=1&cp=8&gs_id=1m&xhr=t&q=usb+com+port&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&biw=1233&bih=606&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=kTtaT4WrHpDZ8gPguJDfDg[^].
If not it is firewire.
One can, aparently, do US to USB debuging, but since you have trouble with your USB subsys it might be affected. WHo knows.
Firewire is the best.
For a tutorial on connecting the machines look on line, in windbg help, and in the DDK (now called WDK).
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Nothing to say.
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There is another way of finding out which driver is responsible (more tedious perhaps). If the machine doesn't freeze in safe mode, then start to add drivers one by one until the freeze occurs. Add one, then use the machine for a period of time, add another then use the machine for a period of time, and so on.
Of course, this will only help in cases where the freezing occurs regularly (let's say at least once or twice per day).
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Thanks Albert, it is once every 2 to 20 days, it drives me crazy.
I'm going to try the usb configuration this week
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still not really understand about notebook and ultrabook battery nowdays.
some said that charging while using notebook will shorten the battery life, some said after full charge, using the notebook without removing the battery won't reduce the battery life.
some said that Lithium Ion Batteries automatically stop charging when it's full and directly use the charger power, so removing the battery to keep it at good condition is not needed.
i love ultrabooks and all of them use built-in batteries, i won't buy an ultrabook if i'll end up destroy the batteries.
there's too many 'some said' and i don't know which one i should believe.
sorry for bad grammar,
please help me battery expert. 
oh i forgot, some said keeping notebook battery in fridge is good. 
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Actually, cold batteries retain their charge for a shorter time.
But, in any and all cases, usually, you're going to get about 2 years out of the batteries no matter what you do. Then you replace them.
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so do you know the best way to use ultrabook?
full charged before using? (keep charging)
full charged before using? (stop charging)
charge while using?
btw thankyou very much for answering almost all of my thread dave. 
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STOP WORRYING ABOUT IT!! There is no "best way"!
You're going to be walking on egg shells around this thing and not enjoying using it!
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Agree with Dave... there's really no great, special way of dealing with batteries... you can try to be efficient with your charge easily enough (stop background tasks, dim display when possible) but trying to extend your battery life is not really worth worrying that much about.
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So I have a windoze box at work that is acting up. It has been doing this since I got it.
Randomly, the usb drive port will shut the computer off when I plug something in. The monitor goes to "no signal" and all running programs seem to have died (tried to remote once to make sure). The power to the box is still on, but it's just dead. The only way I can find to revive it is to shut off the power, and turn it back on.
Any ideas?
If it moves, compile it
modified 5-Mar-12 16:35pm.
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Yeah, it's both of my front ports though. The computer sits under my desk, so it's annoying not to be able to use them.
I've been avoiding it for now, but I was looking for a solution.
If it moves, compile it
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If it happens with anything you plug into those ports, then it sounds like you've either got a short in the cables between the ports on the case and the motherboard, or you've got a bad motherboard.
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Looks like ESD (ElectroStatic Discharge).
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To the downvoters:
thanks a lot for your downvotes.
A few years ago, I worked for a manufacturer of USB devices. Problems with electrostatic discharges were very common for that manufacturer. Consequently, I have seen many effects of such discharges.
Discharges often occur when someone plugs-in the device, but they can also occur later on. They occur more often during winter, when the offices are heated and thus the air is very dry.
In my opinion, the downvoters provided proof of their lack of knowledge, though they are high-ranking CP members.
Thanks in advance for downvoting this message.
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You havent booted into denug mode have you?
Anyway, whats the OS, whats the device, are there upgraded drivers (because thats whats doing it).
Can you boot into debug mode and attach a kernel debugger to it and find the stalled thread?
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Nothing to say.
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