'xf86-video-mga gamma support'

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List:       freedesktop-xorg
Subject:    xf86-video-mga gamma support
From:       Raff Cssa <milanraf () hotmail ! com>
Date:       2021-01-08 9:37:56
Message-ID: SV0P279MB025018758D77B4BFEE235A3FDDAE0 () SV0P279MB0250 ! NORP279 ! PROD ! OUTLOOK ! COM
[Download RAW message or body]

Hello to the list.

I am trying to use a new old stock G550 PCIe card with an IBM P92 19" monit=
or for photo retouching.
Here is my env:
Ubuntu 20.04.1 LTS
Xorg 7.7
xserver-xorg-video-mga 2.0.0
Linux kernel 5.4.0-59-lowlatency

I know that acceleration is broken in 2.0.0 for G550 as reported in:
https://lists.freedesktop.org/archives/xorg/2018-December/059551.html

What about gamma?
I have the following error message
xrandr: Failed to get size of gamma for output default
and I cannot set the gamma levels.
This limitation is undocumented in mga man page and repo.

I am evaluating to replace the G550 with a G450 since the latter supports a=
cceleration, but I'd like to check whether the gamma works on it.

Thanks for reading

Raf

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<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> Hello to the list.</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> <br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> I am trying to use a new old stock G550 PCIe card with an IBM P92 \
19&quot; monitor for photo retouching.</div> <div style="font-family: Calibri, \
Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> Here is my env:</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> Ubuntu 20.04.1 LTS<br>
Xorg 7.7<br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> xserver-xorg-video-mga 2.0.0</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> Linux kernel 5.4.0-59-lowlatency<br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> <br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> I know that acceleration is broken in 2.0.0 for G550 as reported \
in:</div> <div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; \
color: rgb(0, 0, 0);"> <a \
href="https://lists.freedesktop.org/archives/xorg/2018-December/059551.html" \
id="LPlnk815578">https://lists.freedesktop.org/archives/xorg/2018-December/059551.html</a></div>
 <div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> <br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> What about gamma?</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> I have the following error message<br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
                rgb(0, 0, 0);">
xrandr: Failed to get size of gamma for output default</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> and I cannot set the gamma levels.</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> This limitation is undocumented in mga man page and repo.</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> <br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> I am evaluating to replace the G550 with a G450 since the latter \
supports acceleration, but I'd like to check whether the gamma works on it.</div> \
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> <br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> Thanks for reading</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> <br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> Raf<br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: \
rgb(0, 0, 0);"> <br>
</div>
</body>
</html>

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