Linux Mint 18.3 Cinnamon, kernel: 4.15.0-23-generic
LCD Monitor: Acer S201HL with a DVI input
I consulted Fixing the black screen after grub boot-up (screen/video settings mismatch) and numerous other Web pages and forum threads.
I'm not sure but the failure to boot into Cinnamon might be related to the installation of version 17.1 of the FreeCAD program earlier in the day. (Several pieces of Python software were installed as part of the FreeCAD installation.)
Here's a few things that I've tried:
Boot to GRUB. Highlight the default Linux Mint 18.3 Cinnamon 64-bit entry. Hit e to invoke the GRUB editor. Add i915.modeset=0 to the end of the linux line. Hit F10 to boot.
Upon booting I do not see the familiar LM logo but the five horizontal green or white dots are visible. Unfortunately, the boot process stops with five green dots and the disk activity ceases. The GUI does not appear.
Second attempt at GRUB editing: add nomodeset at the end of the linux line.
This time I see the Linux Mint 18.3 text and four green or white dots. Now I am presented with a terminal in which I can log in but the GUI doesn't start.
While in the terminal, I did a sudo apt-get update and a sudo apt-get upgrade. No upgrades were available.
I also did a sudo apt-get autoremove. There was nothing to remove.
Tried kernel 4.13.0-41-generic. No help.
Booted into recovery mode. Ran the fsck file system check. No problems found. Ran dpkg to repair broken packages. Apparently there was nothing to be done there. Ran grub to update the GRUB bootloader. Selected resume to finish the boot from the Recovery mode. The only error I saw was a (probably unrelated) Fail to Start for the lighttpd daemon. I ended up at a terminal screen but still no GUI.
Here's the output of my inxi -F commmand:
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System: Host: CMBDesktop Kernel: 4.15.0-23-generic x86_64 (64 bit)
Console: tty 1 Distro: Linux Mint 18.3 Sylvia
Machine: System: ASUS product: All Series
Mobo: ASUSTeK model: H81M-C v: Rev X.0x
Bios: American Megatrends v: 3501 date: 10/21/2016
CPU: Dual core Intel Pentium G3250 (-MCP-) cache: 3072 KB
clock speeds: max: 3200 MHz 1: 1266 MHz 2: 1442 MHz
Graphics: Card: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
Display Server: X.org 1.18.4 drivers: intel (unloaded: fbdev,vesa)
tty size: 80x25 Advanced Data: N/A out of X
Audio: Card Intel 8 Series/C220 Series High Definition Audio Controller
driver: snd_hda_intel
Sound: Advanced Linux Sound Architecture v: k4.15.0-23-generic
Network: Card: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
driver: r8169
IF: enp3s0 state: up speed: 100 Mbps duplex: full
mac: f8:32:e4:be:58:3e
Drives: HDD Total Size: 371.2GB (30.1% used)
ID-1: /dev/sda model: WDC_WD2500KS size: 250.1GB
ID-2: /dev/sdb model: ST380815AS size: 80.0GB
ID-3: /dev/sdc model: IBM size: 9.1GB
ID-4: USB /dev/sdd model: USB_2.0_FD size: 32.0GB
Partition: ID-1: / size: 214G used: 42G (21%) fs: ext4 dev: /dev/sda1
ID-2: swap-1 size: 16.81GB used: 0.00GB (0%) fs: swap dev: /dev/sda5
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 29.8C mobo: 27.8C
Fan Speeds (in rpm): cpu: 0
Info: Processes: 136 Uptime: 12 min Memory: 322.4/7848.1MB
Init: systemd runlevel: 5 Client: Shell (bash) inxi: 2.2.35