[xubuntu-users] 20.04 install issue: Monitor resolution bad - Solved.

[Ram Ramesh]

On 9/17/20 12:22 PM, Elbert LaGrew wrote:
> I made this simple file and execute it.  The options show un in arandr
>
> #/bin/bash!
> xrandr  --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 
> 1083 1088 1120 -hsync +vsync
> xrandr  --newmode "1920x1200_60.00"  173.00  1920 2048 2248 2576  1200 
> 1080 1083 1088 1120 -hsync +vsync
> sleep 1
> xrandr --addmode VGA-0 1920x1080_60.00
> xrandr --addmode  VGA-0 1920x1200_60.00
>
>
> On Thu, Sep 17, 2020 at 11:29 AM Ram Ramesh <rramesh2400 at gmail.com 
> <mailto:rramesh2400 at gmail.com>> wrote:
>
>     Hi,
>
>        I have been with mythbuntu 14.04 as I have not been able to
>     upgrade
>     to xubuntu 16.04/18.04 and now to 20.04. Every time, I try to do a
>     fresh
>     install, I hit some snag and I have to give up. Hopefully, this
>     time I
>     am able to resolve it before hitting the point of no return.
>
>        Here is what I did in my install. I get the usb done and boot.
>     First
>     the usb stick boots to 4K with tiny little characters as my TV  is 4K
>     (doubles as monitor). I cannot imagine why install would default
>     to 4K.
>     That should be a later option. I could not get out of 4K and I
>     could not
>     see anything to install from a 4K TV.  Now I get a new monitor and
>     everything seems ok, my monitor resolution is perfect 1920x1200,
>     and I
>     proceed to install with special drivers enabled because I want
>     proprietary nvidia drivers. It installs and boots from hard drive and
>     things seem to look ok. However, first software update kills my
>     monitor
>     resolution to 640x480 with no option to change in the display
>     setup. It
>     does not have any other modes and xrandr confirms it also. So,
>     somewhere
>     something went wrong and Xorg is nolonger is able to find the
>     right kind
>     of match between my card and monitor.
>
>        I have no idea as to how to proceed.  I want to know how this
>     happened so that I do not get hit with the same issue next time I
>     upgrade to 22.04. After all, this is free SW and I want to do my part
>     rather than just complain.
>
>        In the past, the issues have been getting mythtv working. This
>     time
>     it is getting install going well.
>
>     Regards
>     Ramesh
>
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>
>
> -- 
> El LaGrew
> http://godchose.blogspot.com/
>
>
This did not help. I suspected that much as I had palyed a bit with 
xrandr and the output I got prior to this test was major suspect.

In any case, I did resolve the issue. Something was haywire with Xorg 
and it was not picking up the right driver. I could not figure this out 
from the Xorg.log in syslog. So, I decided to force the process 
manually. I uninstalled all video drivers (xserver-xorg-video-all and 
its friends) installed just one driver nvidia-440. Sure enough now it 
works as expected. However, my monitor can do 75hz refresh and for some 
reason that was not being detected. I added a new visa mode for 
1920_1200_75 and voila everything is working fine. I would not have 
gotten the last step without your suggestion.  Thanks for suggesting to 
add a new mode.

I see that 20.04.1 is out. So, no point in complaining about 20.04. So, 
I do not plan on filing any bug report.

Regards
Ramesh