LinuxCNC 2.8 blank login screen after successful install
19 Jan 2021 20:02 - 19 Jan 2021 20:03 #195914
by anrstone
LinuxCNC 2.8 blank login screen after successful install was created by anrstone
Hi
I'm new to LinuxCNC and I'm having an odd issue with the install. I have tried the latest 2.8 release both using the graphics mode and text mode install and everything works fine until I reboot. At which point Linux appears to boot normally and then at the very last stage where I assume the login screen would show the monitor warns of a connection been dropped and the screen is blank. I have tried the PC using a straight copy of Debian and it drives the display without issue.
Any ideas how to fix this or even diagnose it?
Thanks
I'm new to LinuxCNC and I'm having an odd issue with the install. I have tried the latest 2.8 release both using the graphics mode and text mode install and everything works fine until I reboot. At which point Linux appears to boot normally and then at the very last stage where I assume the login screen would show the monitor warns of a connection been dropped and the screen is blank. I have tried the PC using a straight copy of Debian and it drives the display without issue.
Any ideas how to fix this or even diagnose it?
Thanks
Last edit: 19 Jan 2021 20:03 by anrstone.
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19 Jan 2021 21:23 #195920
by tommylight
Replied by tommylight on topic LinuxCNC 2.8 blank login screen after successful install
Did you check the md5sum of the downloaded ISO?
linuxcnc.org/docs/2.8/html/getting-start...etting-linuxcnc.html
Section 1.3 Verify the image.
linuxcnc.org/docs/2.8/html/getting-start...etting-linuxcnc.html
Section 1.3 Verify the image.
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20 Jan 2021 08:49 #195977
by anrstone
Replied by anrstone on topic LinuxCNC 2.8 blank login screen after successful install
Yes the MD5 was all good
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20 Jan 2021 11:19 #195985
by tommylight
Replied by tommylight on topic LinuxCNC 2.8 blank login screen after successful install
Am on phone in car so not much i can help, but do a search for
Grub nomodeset
See if that helps.
Grub nomodeset
See if that helps.
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20 Jan 2021 16:38 - 20 Jan 2021 18:13 #196005
by anrstone
Replied by anrstone on topic LinuxCNC 2.8 blank login screen after successful install
That got me to the login screen - thanks
After trying the 2.8 install I have reverted to the 2.7 as the jitter was off the chart (100000+) with 2.8 (8000 with 2.7) and the display simply wouldn't render to any sort of sensible resolution. I'm guessing there are issues with the display hardware which is Nvidia using the 2.8 install but unfortunately I don't have time to dig in now. I don't fully understand why the jitter would be that bad but if anyone has ideas I can spend some time may be at the weekend trying again.
After trying the 2.8 install I have reverted to the 2.7 as the jitter was off the chart (100000+) with 2.8 (8000 with 2.7) and the display simply wouldn't render to any sort of sensible resolution. I'm guessing there are issues with the display hardware which is Nvidia using the 2.8 install but unfortunately I don't have time to dig in now. I don't fully understand why the jitter would be that bad but if anyone has ideas I can spend some time may be at the weekend trying again.
Last edit: 20 Jan 2021 18:13 by anrstone.
The following user(s) said Thank You: tommylight
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22 Jan 2021 01:18 #196171
by andypugh
Replied by andypugh on topic LinuxCNC 2.8 blank login screen after successful install
You should be able to upgrade your 2.7 install to LinuxCNC 2.8.1 _without_ changing the OS or kernel.
The actual LinuxCNC version should have no affect on latency.
The actual LinuxCNC version should have no affect on latency.
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23 Jan 2021 11:06 #196324
by anrstone
Replied by anrstone on topic LinuxCNC 2.8 blank login screen after successful install
Let me try that thanks
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