| Index | Recent Threads | Unanswered Threads | Who's Active | Guidelines | Search |
 |
World Community Grid Forums
Category: Retired Forums
Forum: UD Windows Agent Support [Read Only]
Thread: Wavy screen problem at high CPU utilization |
| No member browsing this thread |
|
Thread Status: Active Total posts in this thread: 19
|
|
| Author |
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hello fellow crunchers,
I have been running WCG software since rollout on multiple computers, and this morning I ran into a snag on one machine (HP dv2000 w/ dual core AMD processor). When CPU utilization gets above approximately 40% for 10+ minutes, the monitor (original to the machine) gets horrible, horizontal lines firing randomly, causing serious interruption in ability to see what's on the screen. When I turn off WCG, the problem goes away almost immediately. Any ideas on what might be happening would be greatly appreciated! HP online "help" was not useful. If I could donate WCG points to the most helpful response I would... alas, no such ability exists.  Cheers, Swieker |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
It sounds like you have a severe hardware problem.
WCG won't damage your computer, but it may exacerbate existing problems. This could be a heating related issue. If you are worried, stop using WCG immediately. You should also have your computer checked over. |
||
|
|
RT
Master Cruncher USA - Texas - DFW Joined: Dec 22, 2004 Post Count: 2636 Status: Offline Project Badges: 
|
My limited experience in this is that there is a Radio Frequency Interference problem. I suppose that a sequence of instructions on the processor could cause it to emit a frequency that would have an effect on the monitor. Interesting in that it sounds heat related. I wonder if you have had the cable between the CPU an monitor off recently. It sounds like some of the shielding may be inoperable for some reason...is the case partly disassembled? If you don't have a damaged or loose cable, I would email HP about the problem. As Didactylos indicated, WCG software should not be able to cause this problem.
----------------------------------------Edit (fixed spelling  )---------------------------------------- [Edit 1 times, last edit by RT at Oct 22, 2006 4:46:25 PM] |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
RT,
I have not had the cable b/w CUP and monitor off ever, nor is the case disassembled at all (it never has been). I have been running Norton's antivirus scan now to try to get the wavy lines back...i.e., to see if it could be only a WCG-inspired problem, such as the interference issue you mention, caused by the instructions from the particular WU (???). The scan has been running for about 25 minutes, and no waves/lines at all. CPU utilization has been between 30-95% constantly during the scan. Maybe I could reject the WU from HDC and get a new one to test the theory. How would I do that? Thanks again! |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I posted that thread about 30 seconds too early! Just got the wavy lines back, while running Norton and while not running WCG. D'oh!
|
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Very strange problem. I used to have "wavy line" problems back when I used old CRT computer monitors.
*In places like school or work the magnetic fields from monitors nearby caused odd problems. Physical seperation fixed that. Sometimes required to press "degauss" on control panel. *Dust would collect inside the monitors and cause them heat up alot. The monitor may randomly turn color, flicker or other malfunction as a result. *I have never seen these old problems in new Flat screen LCD yet. I don't miss CRT problems. A power supply going bad or weak can cause computer lock-ups, reboots, errors in programs...not sure about graphic card problems or monitor flicker. |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Loose cables or bad? I have only seen "wavy lines" caused by disturbances in magnetic fields such as from another Cathode Ray Tube monitor. Or a monitor going bad..maybe just need to be "degaussed" via the control panel on monitor.
*Have had problems with improperly seated video cards...not easy to tell. *Cables not properly attached or possibly dirty. Sounds like someone needs to troubleshoot. A++ certified or something maybe? |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Forgot to mention that back in the military we had Motorola Saber radios. I used to sit behind a CRT computer monitor over in the desert(Kuwait) and watch a thermal infrared camera plus wait for any field sensor(TASS) alarms to go off.
I would sometimes transmit my radio when needed. It would mess up the CRT computer monitor. Sometimes the EMP signals shut off the monitor all together! |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Annoying that a regular cruncher can't edit or delete postings.
I Had another after thought on this issue. I was at another station over in the desert monitoring an infrared camera on a crt display. Every now and then it would flicker and get waving for second then go away. I didn't think much of it or care. One night I stepped outside for a bit and noticed it flickered at the same time the radar dish pointed in my direction during it's rotation. I discovered the source of interference was a radar dish. Guess, I'm just saying that the operating environment sometimes can play a role also. I don't know if any this will help or not. |
||
|
|
depriens
Senior Cruncher The Netherlands Joined: Jul 29, 2005 Post Count: 350 Status: Offline Project Badges: 
|
Couldn't it be a failing power supply unit? If voltages drop below a certain level, you can get all kinds of strange problems. WCG uses a lot of processing power, but so does Norton I guess.
----------------------------------------  |
||
|
|
|