horizontal/vertical synchronization problem with LCD monitors
 

hello all,
i have created a wxwidget application in RHEL4 which
works fine with the CRT monitors. but when it comes to LCD monitors i face the horizontal and vertical synchronization problem.it gives improper display of the
command button and all other objects..plzz help me. Thanx in advance.
j.anwerreyaz

What makes you think that this is a sync problem? If the screen is OK without your app running, sync is not the issue (in my opinion).

What do you mean by 'improper display of ....' ?

ok i can explain...
i use the knoppix bootable cd for my app...
this cd works fine for crt monitors but when i boot
the cd with LCD monitors it says
"out of range
H +35.5 KHz
V +86.8 Hz
"

however after few mins it boots into knoppix
and now when i run my apps
i get improper display(i.e objects are scrambled not in the way they were originally
positioned)
thanx in advance

Can not really judge; Knoppix takes a few minutes to boot (on my old machine). Can't remember exactly what Knoppix displays. Does this happen when you're supposed to see all kinds of info in text mode, or when it switches to graphical mode?
Is the screen OK at the final GUI?

Have you tried to hook a LCD to the RedHat box and configure it properly? Make a backup of the X configuration file and modify the VertRefresh and HorizSync settings to match those of the monitor.
Does problem occur then as well?

yes!!! the LCD works fine with my red hat box but when i boot the cd i get
this out of range display and it does not show all the info's in text mode...
it just stays with that display "out of range" for a while.

but after few mins(sometimes it never works for few machines with different LCD monitors) it gets into knoppix, the diplay of knoppix is all fine!!!!

wat could b wrong? is there any problem with device drivers of LCD monitors or sumthin like that???
help me!!!!

OK, that implies that the knoppix CD does not work properly during the start (text mode). It does not imply that something is wrong in graphics mode. The fact that you can't get some combinations to work in graphics mode, indicates a misconfiguration in Knoppix.

When the Knoppix boot-prompt shows, type knoppix vga=normal. This might help to get rid of the out-of-range message during text mode.
Have a look at the file cheatcodes.txt in the knoppix directory on the cd-rom. It contains other options as well (i.e. forcing certain screen resolutions). You can also press F2/F3 as the boot prompt te get some additional info about options (one of these might help you to get other combinations to work in graphics mode).

Monitors don't have drivers. There are some configuration settings in the X configuration file, but that's it.

I'm totally not familiar with wxwidgets, so can't help further with that part. I'm however convinced that it does not have to do with the out-of-range message.