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BloodyNewbie
Tux's lil' helper
Joined: 19 May 2004
Posts: 88
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 Posted: Mon Jun 13, 2005 11:49 am Post subject: acer AL1914 Monitor xorg.conf settings? |
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Hi all
As the Acer AL1914 TFT 19" Monitor is pretty new, I had no success finding any valid xorg.conf settings, although
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Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Acer AL1715"
DisplaySize 340 270
HorizSync 24.0 - 80.0
VertRefresh 49.0 - 75.0
Option "dpms"
EndSection
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reference: http://www.phoronix.com/scan.php?page=article&item=125&num=4
works, there's something wrong, the image is not good, it has like "waves" on the screen, as if a faint white curtain with pattern would hang in front of the monitor.
The above setting is for, as you can see an AL1715, so not quite the same model, but as said, it works, just not good (enough).
Not even the newest knoppix release finds the settings correctly! The background still glitters in a bad way.
What knoppix found:
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Monitor is ACRad29, H:30-85kHz, V: 55-75Hz
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Oh and the factory specs are(sorry, german):
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Bildschirmdiagonale - 19"
Auflösung - 1280 × 1024
Farbunterstützung - 16.7 Mio Farben, RGB 8-bit
Pixelabstand - 0.264 × 0.264 mm
Blickwinkel horizontal - 140°
Blickwinkel vertikal - 140°
Reaktionsgeschwindigkeit - 12 ms
Helligkeit - 250 cd/m2
Kontrast - 500:1
Vertikalfrequenz - 49 - 75Hz
Horizontalfrequent - 24 - 80KHz
Anschluss - VGA 15-pin D-Sub
Abmessungen (B × H × T) - 422.2x433x175.8mm
Gewicht - 5.6 kg netto
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In KDE I now set the standard repeating rate to 60Hz, now the "flimmering" is gone, but the bad pattern still resides :I
Thanks for your consideration, I will search more, but to now, I have no search engine left to dig with  PS: Gentoo Forum Search is not really helpful :I
best regards
patrick
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ekutay
l33t
Joined: 30 Mar 2005
Posts: 636
Location: Berlin
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| Posted: Tue Jun 14, 2005 1:05 am Post subject: |
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It sometimes happens that the vertical refresh rate is not adjusted properly for TFTs. Nevertheless the xorg.conf snippet show actually the correct settings. I would either try to activate DPMS or fix the refresh rate to 60Hz.
| Code: | | Option "DPMS" "true" |
or
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BloodyNewbie
Tux's lil' helper
Joined: 19 May 2004
Posts: 88
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| Posted: Tue Jun 14, 2005 9:10 am Post subject: |
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Thank you for the answer
I did the VertRefresh to 60 in kde as I posted
| Quote: | In KDE I now set the standard repeating rate to 60Hz, now the "flimmering" is gone, but the bad pattern still resides :I
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And the flimmering was gone, but the picture was still bad
I now did it in the xorg.conf as you said:
And it has the same effect, background not flimmering anymore but picture still bad,
Had no chance to try the dpms setting, but you can see in my xorg conf that dpms SHOULD be enabled, just not in the syntax you wrote me, I have to test that.
I tried to make a screenshot, here it is:
http://www.snowtraces.com/img/bsp.jpg
But obviously it's bad  I encircled the part, that MAY be visible: on the left of some text you can see like a blurred "trace" of the text, and moving the window where the text is inside, this trace follows.
But also there are vertical lines/bars that are not straight, but as well fuzzy which I couldn't capture with the camera, because the camera doesn't like to picture a tft screen as it seems...
best regards
patrick
PS: What I hate most, is that the monitor works perfectly under winXP :I so there is no hardware issue...
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ekutay
l33t
Joined: 30 Mar 2005
Posts: 636
Location: Berlin
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| Posted: Tue Jun 14, 2005 10:30 am Post subject: |
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Try xvidtune to tweak the modelines of your monitor.
If everything is (hopefully) adjusted as needed, press show and paste the resulting modeline as modeline in your xorg.conf in the screen section.
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BloodyNewbie
Tux's lil' helper
Joined: 19 May 2004
Posts: 88
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| Posted: Tue Jun 14, 2005 10:37 am Post subject: |
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Hi, thanks for the reply!
I found out now that with a different video card it works flawlessly!
Bad one: Mach64 3D Rage IIC AGP
Good one: ATI Rage 128 PRO AGP
Using the same settings
*shrugs
but I will try the tweaking, thanks for the hint!
best regards
patrick
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