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List:       freedesktop-xorg
Subject:    xrandr is required if resolution is changed from GDM
From:       Kalpesh Rathod <kalpeshb.rathod83 () gmail ! com>
Date:       2014-05-23 13:53:45
Message-ID: CA+jP3Dsn8i5s6at2bPyXwepgPfmtb0mZZU-fDqGPJY73emyWcA () mail ! gmail ! com
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Hi,

I am working on X.org driver for an arm SoC. It support HDMI video out. The
X.org driver + kernel fb driver is working and I get the display. The
system uses Ubuntu precise. I have problem while changing the resolution.
In our X.org driver we have

pScrn->SwitchMode = fbdevHWSwitchModeWeak();

After resolution change operation from 'Displays' applet in ubuntu GDM, I
get blank screen.

At this stage, if I do ssh and fire 'xrandr' without any argument, the
resolution change works fine. I am not able to understand this behavior.

If I change resolution from terminal using xrandr, then also I have to use
it twice.
e.g.
xrandr --output HDMI --mode 1920x1080 --rate 60
xrandr


Please guide me, what I should do in my X.org driver , so resolution change
works without need to execute 'xrandr'.

Thanks in advance.

Regards,
kalpesh

[Attachment #5 (text/html)]

<div dir="ltr"><div><div>Hi,<br><br></div>I am working on X.org driver for an arm \
SoC. It support HDMI video out. The X.org driver + kernel fb driver is working and I \
get the display. The system uses Ubuntu precise. I have problem while changing the \
resolution. In our X.org driver we have<br>

<br>pScrn-&gt;SwitchMode = fbdevHWSwitchModeWeak();<br><br></div><div>After \
resolution change operation from &#39;Displays&#39; applet in ubuntu GDM, I get blank \
screen. <br><br></div><div>At this stage, if I do ssh and fire &#39;xrandr&#39; \
without any argument, the resolution change works fine. I am not able to understand \
this behavior.<br> <br><div>If I change resolution from terminal using xrandr, then \
also I have to use it twice.<br></div><div>e.g. <br>xrandr --output HDMI --mode \
1920x1080 --rate 60<br></div><div>xrandr<br></div><div></div><br> \
<br></div><div>Please guide me, what I should do in my X.org driver , so resolution \
change works without need to execute &#39;xrandr&#39;. \
<br></div><div></div><br><div>Thanks in \
advance.<br><br></div><div>Regards,<br>kalpesh<br>

</div></div>



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