Hi,

I have a little problem only in screens 1920x1080 and 1680x1050: I see sometimes the screen black for a while (1 or 2 second) moving the windows.

I had the same problem in Amiga OS4.1 (with my Pegasos2) and I have solved via tooltypes editing in "1920x1080@60+RB" "1680x1050@60+RB"; so in MorphOS 2.4 what do I need to do to solve the same problem ?.

(details:
Pegasos2 G4@1000, AGP ATI 9250 256, monitor lcd Samsung 24" SyncMaster 2494HS, MorphOS 2.4.)

Thanks a lot.
Regards

> I have a little problem only in screens 1920x1080 and 1680x1050: I see sometimes
> the screen black for a while (1 or 2 second) moving the windows.

Same here at 1680x1050 on Mac mini with Philips 220XW. Luckily it occurs very rarely, so not really disturbing.

[ Edited by Krashan on 2009/11/6 9:32 ]

I don't know if it's the same problem, but with couple of cheap (BenQ) monitors I get short blackouts occasionally with MorphOS. It's so rare that it doesn't bother me. But when I connected Mac mini on them with OSX, the problem was way worse. It happened constantly and first I thought it was related to some movement or load, but at the end it seemed to be random. Then I installed SwitchResX program, which makes possible to tune resolutions under OSX, and it helped.. no black srceens after that.

With some other monitors it never happens... so, I guess it's because some monitors are more picky about the frequencies they get and fine tuning the settings may help. So.. don't give up on hope with some resolutions until you try to check and/or tune its frequencies with Monitors settings in MorphOS for example.

these are my settings in 1920x1080 at 24bit:

Pixel Clock 138500100 Hz
Sync lenght 336 and 15
Pulse Offset 48 and 3
Pulse Lenght 144 and 5
- and -
61.3918 Hz and 56.0655 Khz


these are my settings in 1680x1050 at 24bit:

Pixel Clock 147118200 Hz
Sync lenght 576 and 36
Pulse Offset 104 and 1
Pulse Lenght 184 and 3
- and -
65.2119 Hz and 60.0477 Khz

The monitor is SAMSUNG SyncMaster 2494HS (I have the same settings with Mac Mini MorphOS 2.4 using an other SyncMaster 2494HS lcd).

thanks
regards

hi,

no idea to solve this probably easy problem ?
I always have problems with 1920x1080 and 1680x1050 in MorphOS 2.4 ; same problem solved in OS4.1 with "+RB" variable.
I hope someone help me...

thanks

@Divinity
Hi i also had this problem earlier, and also some graphics miscolour.
I run my mini @46" LCD Full HD :)
Here are the link to my settings http://home.swipnet.se/~w-160129/Monitor/
To solve the black problem i had to change the horizontal synchronizing in the editor for the monitor specification from 2.4000 (Original1.png) to 1.7000 (Changes1.png).

To solve the miscolour please see Original2.png and Changes2.png and i also had to lower the vertical frequence from 56 to 40 see Original1.png and Changes2.png

I also provide you with my monitor files before and after change.

@MorphOS Team, this isn't reported becase i can't submit pictures in the bugreport, so please look into this:) thanks.


[ Edited by dake on 2009/11/15 12:49 ]

[ Edited by dake on 2009/11/15 13:01 ]

@dake

thansk but not solved :(

I have downloaded the manual of Samsung SyncMaster 2494HS here :

LINK

Synchronization
Horizontal 30 ~ 81 kHz
Vertical 56 ~ 60 Hz

Resolution
Optimum resolution 1920x1080@60 Hz (RB)
Maximum resolution 1920x1080@60 Hz (RB)

Maximum Pixel Clock
164 MHz

Display Mode Horizontal Vertical Fre- Pixel Clock Sync Polarity
Frequency quency (Hz) (MHz) (H/V)
(kHz)
VESA, 640 x 480 31.469 59.940 25.175 -/-
VESA, 800 x 600 35.156 56.250 36.000 +/+
VESA, 800 x 600 37.879 60.317 40.000 +/+
VESA, 1024 x 768 48.363 60.004 65.000 -/-
VESA, 1280 x 800 49.702 59.810 83.500 -/+
VESA, 1280 x 960 60.000 60.000 108.000 +/+
VESA, 1280 x 1024 63.981 60.020 108.000 +/+
VESA,1440 x 900 55.935 59.887 106.500 -/+
VESA,1600 x 1200 75.000 60.000 162.000 +/+
VESA,1680 x 1050 65.290 59.954 146.250 -/+
VESA,1920 x 1080 66.587 59.934 138.500 +/-

So, please, how do I need to setup :
Sync lenght H and V
Pulse Offset H and V
Pulse Lenght H and V

to have the right Pixel Clock 138.500 and the right Horizontal and Vertical 66.587 and 59.934 frequency ?
Sorry but I don't find a solution to this problem ...
(with OS4.1 I solve this problem with +RB variable...)

help please :(

@Divinity
What horizontal synchronization value "Min Time" do you have?
And what values did you trie?
You must "Save" from monitor specification and "Save" from MorphOS Preferences to see this kind of change.


[ Edited by dake on 2009/11/17 20:02 ]

@Dake
I have as default 2.4000, then I have changed and saved to 1.7000, but alway I have this problem :((((
Note that I don' have problem at 1280x1024 and less....I have only problem at 1920x1080 and 1680x1050.

:(

1.7000 worked for me, but you should try different values that suit you.
I decreased the value in steps of 0.1 until it worked:)
If you are unlucky you can always play with the other numbers, maybe you will find something:)

[ Edited by dake on 2009/11/18 19:52 ]

@dake
Hi,
I have tried from 2.4000 to 0.1000 ... alway with the same problem :(

Is there a variable like to +RB (in AmigaOS4.1) to solve this problem ?.
I think It's a very simple problem.

:(

thanks

no idea ?
I don't wanto to use MOS 2.4 at 1280x1024 sorry.
Damn, Is It impossible to solve this problem ?

thanks
regards

@Divinity
Play around with the other settings in monitor specification, i dont know if this can destroy your monitor but perhaps its new so you can claim it was broken if something happens :)

[ Edited by dake on 2009/11/21 11:17 ]

@Divinity

Does it happen when you boot directly from a CD?

@itix
I have verify with bootstrap from cdrom of MorphOS 2.4 (the default screenmode is 1920x1080) and I have the same problem :
1) the sreen sometime become black for about 1 or 2 seconds.
2) if I see (for exemple) the image of "Welcome in MorphOS" after the boot from cdrom, I see some graphic error, some little flash error in the image (same problem for exeple using Quake 3 in a window in MOS).

Note, as said before... that There are NOT these problems in 1280x1024 or less.
Note also I have there problems only in MorphOS 2.4 (not in Linux, not in OS4.1 where solved with +RB variable).

Tell me if you need other informations to solve the problem.

thanks for the support.
Best regards

Thread on the topic over at amiga.org:

http://www.amiga.org/forums/showthread.php?t=54929

@Andreas_Wolf

I have solved this problem changing the monitor
I used Samsung 23,5", now I use Asus 24" ad It's ALL OK PERFECT with Pegasos2 (connected in DVI mode) and with PowerMac FW800 (connected in HDMI mode via DVI-->HDMI adaptor)