When Windows is running the refresh rate is 64.8 KHz. The monitor's
pop-up window says "64.8 kHz 60 Hz PN". I don't know what PN means?
When Linux is running, it says "86.6 kHz 70 Hz"
So that may be the problem. Could you let me know how I change the
refresh rate. Thanks.
At 03:03 PM 5/24/2008, Rich Ernst wrote:
You don't say what the refresh rate the system is running at, that's
what I was referring to. Did you understand what I said
previously/below, or am I missing something else? You need to lower
the refresh rate, not the "resolution" to 60. You can check what it
is from within Windows, preferably while running it on the CRT.
Lief Hendrickson wrote:
I neglected to say the Samsung monitor (which exhibits the problem)
is a flat screen monitor (SyncMaster 2253LW). The other monitor I
used to test is the CRT, and it works fine with Linux and
Windows. The flat screen quits after complaining a few times with
the pop-up window. The setting 1024x768 is listed as one of the
possible settings in the brief manual that came with the monitor so
I would think it would run OK with that setting... unless there is
some other adjustment I don't know about.
At 03:27 AM 5/24/2008, Richard Ernst wrote:
Usually LCD monitors work best at 60Hz, whereas CRTs are run
higher, 70, 75, 85, or more to eliminate flicker. LCDs don't have
any flicker, so the 60Hz standard is fine.
Check that setting first, perhaps resetting resolution/refresh
while running the CRT so you can see things... :)
Linux, especially an older version, might not check the display
and change accordingly, whereas Windows has since probably windows 98.
Lief Hendrickson wrote:
One of my computers is an old PC with dual boot Windows and
Fedora 2.6 (old machine.. haven't used it enough to update). I
attached a new monitor Samsung 21.6" in analog mode. It works
fine with Windows running at 1024X768. When I booted into Fedora
(also set at 1024x768), the monitor worked at first. Then a
message window from the monitor popped-up. It said "Not optimum
mode, Recommended mode 1920x1200".
This happened after I had time to log in. I pushed the auto
button on the monitor (for lack of knowing what else to do... it
adjusts the image placement on the screen) and the
monitor-generated pop-up window went away temporarily... but it
soon come back. A short while later the screen went blank. I
kept the computer running, disconnected the monitor, and
connected an old CRT monitor. The Linux screen was still there
and everything worked fine with the CRT monitor. I shut down,
reconnected the new monitor, and repeated the process with the
same results. Any ideas why I can't use the new monitor with
Linux? Why would the monitor work during Linux boot and for a
short after login, but then quit? As mentioned, it works fine
under Windows indicating the monitor is in good condition.
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