Hello,
I recently replaced my old 17" CRT monitor with a Samsung 22" LCD monitor (Samsung 2253bw). Since upgrading, I have experienced some problems with it.
My computer is about five or six years old now, and I suspect that the issue might be related to the video card. It is the Asus V9560 video suite (specs at
http://www.asus.com/products.aspx?mo...l2=7&l3=8&l4=0 )
Problem Description:
* The monitor output will periodically go "blank", meaning that there is no visual output on the LCD monitor.
* The intervals at which the LCD goes blank appears to be somewhat random. However, when I play a DVD, a video file, or watch tv using my TV tuner card, the problem appears to get worse, with the output going blank more frequently, if not completely going blank until I exit these programs.
* Sometimes, before going blank, I can see static lines forming on the screen.
* If I use the analog connecton, the same problems are there. However, in addition, I can faintly see the screen moving from left to right, as if there were a problem with the horizontal refresh rate.
What I've done so far in debugging the situation:
* I read through
http://www.linuxquestions.org/questi...m-mode-475182/ and made sure that my X11 config file did have the correct settings, and even installed the nvidia-settings control tool to confirm.
* Suspecting a problem with the monitor, I tried it on another computer. The monitor works on a relative's computer, running Windows Vista. This computer is approximately a year old. The video card in my parents computer is the Asus GeForce 7600GS (400MHZ PCI-E 512MB)
* Futher, my old CRT monitor does not appear to have these issues. However, there were instances (rare though) in which I received garbled output on my CRT monitor. I'm having trouble putting "garbled" into words, so I tried googling something to describe it. See the link below:
http://img520.imageshack.us/img520/8...eenmessxn0.jpg
My CRT monitor, on rare instances, looked like this when starting up.
* According to nvidia-settings and xdpyinfo, the resolution is set to 1680x1050 and the refresh rate is set to 59.88Hz. The native settings of the monitor are 1680 x 1050 at 60Hz. If anyone has a monitor with a native refresh rate of 60Hz, can you tell me if it is normal for the refresh rate to show up as 59.88Hz in nvidia-settings?
* This issue did occur on my computer in the Windows partition, but not nearly as often. Suspecting a problem between Fedora and the monitor, I tried using the monitor on my notebook's Fedora partition and playing a DVD. There were no issues during the test that I made.
It was suggested to me by someone that I check the temperature of the motherboard / cpu to see if they are possibly overheating. I have used lm_sensors to check on the temperature of my motherboard and CPU, they are
Motherboard: 46 C
CPU: 43 C
I also noted that the CPU fan was listed as going at 3901 RPM. I'm not sure if the CPU fan rpm is an issue or not.
I'm hoping that some kind individual can assist me in figuring out this issue. Is there something that I might have looked over in Fedora? Can anyone else suggest any other tests to try to confirm the source of the problem.
I'm beginning to think that there might be a problem with the video card being able to support the new LCD monitor, or perhaps the old video card is about to die. However, as the CRT did not have these problems this frequently, and they do not occur in the Windows partition as often, I am not certain if this is the case.
If there is any further information that I can provide (for instance, xorg.conf file, etc), please let me know.
I'm not next to the monitor right now, so I can't readily do any tests or run anything in the terminal, but I figure that I would post this now in case anyone could confirm if this is a video card issue, or an issue with Fedora / Linux, or something else.
My apologies if any of the above is unclear. Thank you all in advance for any assistance you can offer.
