Unable to get good resolution on monitor

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chem413
Posts: 1
Joined: 2018/09/08 08:09:25

Unable to get good resolution on monitor

Post by chem413 » 2018/09/08 08:24:06

Hi, I now got probably the same issue with him (Moderator: split away from an old thread in CentOS 6 Support viewtopic.php?f=14&t=66829 - please don't hijack threads for unrelated problems). I just installed Centos7 on my computer. When I tried to change the resolution, I only got one available option of 1024*768. However, the recommended resolution may be 1920*1080. I tried to solve this as follows.

[root@localhost X11]# cvt 1920 1080
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync

[root@localhost X11]# xrandr --addmode default "1920*1080_60.00"
xrandr: Failed to get size of gamma for output default
xrandr: cannot find mode "1920*1080_60.00"

I got a failure the I type in 2nd command. I also have one monitor installed.
[root@localhost X11]# lspci | grep -i --color 'vga\|3d\|2d'
00:02.0 VGA compatible controller: Intel Corporation Device 3e92

Can you please give me some advice on that? that will be greatly appreciated. Thanks.

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TrevorH
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Joined: 2009/09/24 10:40:56
Location: Brighton, UK

Re: Unable to get good resolution on monitor

Post by TrevorH » 2018/09/08 14:31:59

Please post the output from lspci -nn | grep -i vga

Is the xorg-x11-drv-intel package installed? Post the contents of /var/log/Xorg.0.log either here on on http://pastebin.centos.org and link to it.
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

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