Intel Graphics - Image on monitor not correct using HDMI, VGA works fine.
Hello Linux forum,
In my desktop computer tower (Gentoo), I have an onboard Intel graphics VGA compatablle controller (Intel Corporation 2nd Generation Core Procesor Family Intergrated Graphics Controller rev 09), and it offers both VGA and DVI-D outputs. The VGA output runs my wide screen LG monitor perfectly but when I connect the same monitor using the DVI-D output, the image on the monitor is not very clear and it is too far to the left and the aspect ratio is not correct. (I have to use a DVI-D to HDMI adapter since my monitor only has an HDMI input, not a DVI-D imput). Also, there are no adjustments on the monitor that corrects this behavour and I am using the monitor's optimal resolution of 1920 x1200 with both VGA and HDMI. Changing to lower resolutions does not help much.
I am using KDE4, and making changes to the system settings/monitor configuration does not correct this problem. Since the Inter driver for the graphics controller is compiled into the kernel, there is nothing else I know to try just short of maybe turning on something else in the kernel http://wiki.gentoo.org/wiki/Intel .
It is noteworthy to say the DVI-D video output will run my wide screen TV fine without the aformentioned problem when using this DVI-D to HDMI adapter (with the exception of a little overscan which I believe is normal).
Can anybody please tell me what could be causing this problem? Would buying another monitor with a DVI-D input fix the problem so I would not have to use the DVI-D to HDMI adapter, assuming the problem is with the adapter? Is there something in Xorg I could change? I do not have an xorg.conf file but I have something similar in /usr/share/X11/xorg.d/10-evdev.conf according to the xorg log file.
Letś check on modules working. You power on, immediately enable the hdmi screen (Fn Something on a laptop, or simply use it as default). Then it loads the module, usually noticable by a KMS graphics happening, usually the text shrinks, and then X comes up. Is all that happening for you in that order?
Post the output of
glxinfo |grep render
Hello business kid,
Thanks for your time.
When booting up, the text does shrink when kernal mode setting kicks in, then X comes up. KMS is set in the kernel. I'm afraid I don't know what you mean when you say to enable the HDMI screen using the function key. I am using my monitor which is capable of both HDMI and VGA, depending on how the monitor is switched. The monitor is in HDMI mode during my testing.
The output if glxinfo | grep render is:
royroy@localhost ~ $ glxinfo |grep render
direct rendering: Yes
OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Desktop x86/MMX/SSE2
Here is a list of the loaded modules if you need to see them:
I would run xrandr, and play with options like panning, changing modes, and a verbose output which gives you the mode line.
The modeline format is <right visible> <right invisible> <left invisible> <left visible>, which also is 0 on the next line. If your picture is to the left, the left invisible is too small, or the dot clock too fast.
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