prd_cv1 wrote: ↑
Yesterday (18/09/2019), my centos 7.6 workstation was updated to new kernel ( lsb_release -a : CentOS Linux release 7.7.1908). Ok
but, now at startup, each time I choose the new kernel, instead having as usual all scrooling text showing loading message (or warning) the screen turn black (nothing!)
After a long time, if I press the power button to suspend system and wack-up it pressing a second time it, I can see the GNOME logging screen and connect
So what's wrong with ??
I haven't got a clue. Let's try to ferret out the answer:
1) You say, "my centos 7.6 workstation was updated to new kernel" Did you a) Do a NEW Install b) Rolled over your system to 7.7 from 7.6 using the yum update
2) You say, " I choose the new kernel
. This is a BIG Clue: You should NOT have to CHOOSE the new kernel. The new kernel should become the DEFAULT kernel unless... 1) Do you have a dual boot Windows / CentOS system or 2) Is CentOS 7.x (7.6 in this case) the ONLY OS on the drive?
3) Are you using a Laptop or a Desktop system??
Here is my *GUESS*: If you have a dual boot Windows / CentOS 7 system when you rolled over your machine you *probably* overwrote the boot system, and your boot menu is probably scrambled. If CentOS 7.6 was the ONLY OS on the system, then you probably have a hardware problem.
OK Things to Try:
1) You DID backup your drive BEFORE you did the update?!? If you DID backup your drive BEFORE you rolled over the system, then your best option is to simply drop back 10, and punt and do a restore of 7.6, and see if you still have the problem. If you DID NOT backup your drive, SHAME ON YOU! You are about to find out why you should ALWAYS BACKUP YOUR DRIVE before a major point up date -- there is simply no going back.
2) If you DID NOT backup your drive before you rolled over the machine, your options are limited. The best thing to do right now is to download the CentOS 7.7 DVD.iso and do a total reinstall from scratch, BUT... during the install phase do a custom install, and keep your /home directory. During the install start over, create a new user, new password, etc., etc., etc. Once you have finished the install the NEWEST kernel will become the DEFAULT kernel -- you don't have to "Choose" it. After 5-10 seconds have timed out it will automatically load.
3) If you have a Dual Boot Windows /CentOS 7 system you'll have to ask for help how to unscramble your system. The black screen you describe *sounds* like the system is timing out and is dropping into a screen saver mode. This could be caused a scrambled grub2 menu, and YES the grub2 menu can become scrambled. One of the reasons I hate GRUB2. There is a nifty utility that EVERYONE should have called Grub Customizer, it can save you in the event of a scrambled menu. It is a GIANT PITA if you have a scrambled menu, that has to be unscrambled. I found a good piece of insurance to have on hand is to backup /boot, /etc/default, and /etc/grub.d and copy them to a safe place (I made a directory in /home/dcat called /Computers under which I created a Sub-directory called /Backup_config_files. If your files get scrambled go to where ever you have stored these copies of those files, then delete the corrupted files and copy your backups into the corresponding places and re-boot. It will save you hours of frustration.
4) You you did a new install from a 7.7 DVD.iso rather than a roll over via yum update, then it is possible the system is recognizing there are duplicate files that it is trying to figure out and untangle.
5) You could also have a hardware problem.
As I said what is WRONG with your system? I haven't got a clue. You are simply going to have to put in the research, checking log files etc. etc., etc., etc.
Hope you track down the problem.