CentOS - Oct 2014 - A little help with default resolution of CentOS7 and Panasonic TV

Hi, everyone.

tldr: How in the heck do I force CentOS7 to boot to a low/conservative GDM
resolution?


Hoping someone can lend a hand getting CentOS7 to sync to my Panasonic
Vierra 42' TV. It worked fine in CentOS6.5 but since installing I boot to a
GDM background with no login prompt. I can SSH into the node and configure
multiuser runlevel but that's not fun at all. ;)

Here's the output of xrandr:

# systemctl get-default
graphical.target

# xrandr -display \:0 -q
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected primary 1920x1080+0+0 (normal left inverted right x axis y
axis) 698mm x 392mm
   1920x1080      60.0*    59.9     24.0     24.0
   1920x1080i     60.1     60.0
   1280x720       60.0     59.9
   1440x480i      60.1     60.1     60.1
   720x480        60.0     59.9
   640x480        60.0     59.9
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)

# xrandr -display \:0 --output HDMI1 --mode 640x480
# echo $?
0

# /bin/systemctl restart  gdm.service
# echo $?
0

So setting to something very conservative doesn't make a difference nor do
any of the other detected modes. I also tried bouncing the TV to see if
that would help. Nada.

-- 
--- V

On 10/8/2014 4:17 PM, Nathan Valentine wrote:
> Hoping someone can lend a hand getting CentOS7 to sync to my Panasonic
> Vierra 42' TV. It worked fine in CentOS6.5 but since installing I boot
to a
> GDM background with no login prompt. I can SSH into the node and configure
> multiuser runlevel but that's not fun at all.;)
that TV should be capable of 1920x1080p at 60Hz on HDMI output. your 
display mode stuff concurrs with this, and sees the TV on HDMI1.

it should just be working.

-- 
john r pierce                                      37N 122W
somewhere on the middle of the left coast