LinuxCNC on Linux Mint 20 quick and nearly easy install

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18 Feb 2021 00:16 #199209 by BigJohnT
tommylight, do you know if a internet connection is required to install? I tried this morning with a USB adapter micro SD card and it said it failed to read the CD drive? I had no internet this morning as the dish was covered with snow...

JT

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18 Feb 2021 00:35 #199213 by tommylight
To install Linux Mint it does not, just do not choose to update while installing or to install additional codex.
Most of the other files can be downloaded and transferred, but i am sure there are some other files downloaded during install that are not on the list.

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21 Feb 2021 18:38 #199640 by MarcoGaspar
Hello,

Thanks for the 5* post :D

I installed mint 20 following this post steps and it's all working (linuxcnc).

The only thing i can't do is setting a higher resolution for my monitor on RT kernel how can i add more resolutions?

Best Regards,
Marco Gaspar
The following user(s) said Thank You: tommylight

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21 Feb 2021 21:05 #199648 by tommylight
What does
xrandr
in a terminal say ?

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21 Feb 2021 21:27 - 21 Feb 2021 21:43 #199651 by MarcoGaspar
xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 640 x 480, maximum 640 x 480
default connected primary 640x480+0+0 0mm x 0mm
640x480 73.00*

cvt 1920 1080 60
# 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


xrandr --addmode default 1920x1080_60.00
xrandr: Failed to get size of gamma for output default
xrandr: cannot find mode "1920x1080_60.00"
Last edit: 21 Feb 2021 21:43 by MarcoGaspar. Reason: Adding

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21 Feb 2021 22:25 #199658 by tommylight
Something very screwy there, no graphic anything! :S
What graphic card?
Here is what i get:
cnc@X570:~$ xrandr
Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 16384 x 16384
DisplayPort-0 disconnected primary (normal left inverted right x axis y axis)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 connected 2560x1440+0+0 (normal left inverted right x axis y axis) 708mm x 399mm
   2560x1440     59.95*+  69.93  
   1920x1200     59.95  
   1920x1080     60.00    50.00    59.94  
   1600x1200     60.00  
   1680x1050     59.88  
   1600x900      60.00  
   1280x1024     60.02  
   1440x900      59.90  
   1280x800      59.95  
   1280x720      60.00    50.00    59.94  
   1024x768      60.00  
   800x600       60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       60.00    59.94  
   720x400       70.08  
HDMI-A-1 disconnected (normal left inverted right x axis y axis)
DVI-D-0 disconnected (normal left inverted right x axis y axis)
cnc@X570:~$ 

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22 Feb 2021 01:22 #199668 by tommylight
In general, if something is not working on Linux Mint i blame the hardware ! :)
Can you try to boot with the generic kernel and check if that works?
I am aware that RTAI kernel caused low resolution on some PC's but it was at least 1024x768, never had issues with RT-Preempt on any PC, and i have 3 of them and 3 laptops on this desk only, more in the shop.

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22 Feb 2021 06:39 #199679 by MarcoGaspar
I will reinstall it.

Maybe a graphic card solve this?

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22 Feb 2021 20:52 #199765 by MarcoGaspar
Its the same.... already try to reinstall 3 or 4 times...

without the rt it works:

mjg@CNC:~$ xrandr
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 16384 x 16384
DP-1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.00*
800x600 60.32 56.25
848x480 60.00
640x480 59.94
HDMI-1 disconnected (normal left inverted right x axis y axis)
mjg@CNC:~$

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