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Old 10-20-2018, 01:26 PM   #1
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I think I want to prevent GRUB from starting automatically - Dual SSD machine (Windows 10 and Linux Mint)

So, I have this dual SSD Alienware 15 R3. As I mentioned in the subject, one drive is W10 and the other is LM19. Here is my problem...

If I push the power button and just stand back, Linux starts up. That's fantastic. I love that it's the primary OS. The problem is when I need Windows, I push F12 (Boot Option) when I see the Alienware logo and sometimes it does the 'right' thing (i.e. a blue screen pops up and it offers me Legacy or UEFI boot options. Under UEFI it says 'Windows Boot Manager'. I click that and W10 boots up) and sometimes it does the 'wrong' thing (i.e. it goes to GRUB and I'm only offered a choice of Linux Mint 19 or memory test). There's no predicting which will pop up (the blue Legacy/UEFI screen or GRUB). It seems totally random.

What I think I want to do is prevent Grub from ever coming on automatically but I'm not sure if that will mess something up or not.

Also, shouldn't I be able to set it up so that when GRUB does come I should see an option to boot into Windows or would that only be with a dual boot (not dual drive) machine? If I could make it do that, that would be the ideal solution.

Here are the hw/sw specs for my laptop:

mac@mac-Alienware-15-R3:~$ inxi -Fxzd
System:    Host: mac-Alienware-15-R3 Kernel: 4.15.0-36-generic x86_64
           bits: 64 gcc: 7.3.0
           Desktop: Cinnamon 3.8.9 (Gtk 3.22.30-1ubuntu1)
           Distro: Linux Mint 19 Tara
Machine:   Device: laptop System: Alienware product: Alienware 15 R3 v: 1.2.4 serial: N/A
           Mobo: Alienware model: Alienware 15 R3 v: A00 serial: N/A
           UEFI [Legacy]: Alienware v: 1.2.4 date: 01/25/2018
Battery    BAT1: charge: 70.2 Wh 100.0% condition: 70.2/99.0 Wh (71%)
           model: COMPAL PABAS0241231 status: Full
CPU:       Quad core Intel Core i7-7700HQ (-MT-MCP-) 
           arch: Skylake rev.9 cache: 6144 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 22464
           clock speeds: max: 3800 MHz 1: 800 MHz 2: 800 MHz 3: 800 MHz
           4: 800 MHz 5: 800 MHz 6: 800 MHz 7: 800 MHz 8: 800 MHz
Graphics:  Card-1: Intel Device 591b bus-ID: 00:02.0
           Card-2: NVIDIA GP106M [GeForce GTX 1060 Mobile] bus-ID: 01:00.0
           Display Server: x11 (X.Org 1.19.6 )
           drivers: modesetting (unloaded: fbdev,vesa)
           Resolution: 1920x1080@60.02hz
           OpenGL: renderer: Mesa DRI Intel HD Graphics 630 (Kaby Lake GT2)
           version: 4.5 Mesa 18.0.5 Direct Render: Yes
Audio:     Card Intel CM238 HD Audio Controller
           driver: snd_hda_intel bus-ID: 00:1f.3
           Sound: Advanced Linux Sound Architecture v: k4.15.0-36-generic
Network:   Card-1: Qualcomm Atheros Killer E2500 Gigabit Ethernet Controller
           driver: alx port: d000 bus-ID: 3c:00.0
           IF: enp60s0 state: down mac: <filter>
           Card-2: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter
           driver: ath10k_pci bus-ID: 3d:00.0
           IF: wlp61s0 state: up mac: <filter>
           Card-3: Atheros usb-ID: 001-003
           IF: null-if-id state: N/A speed: N/A duplex: N/A mac: N/A
Drives:    HDD Total Size: 3000.6GB (11.7% used)
           ID-1: /dev/sda model: WDC_WDBNCE0010PN size: 1000.2GB
           ID-2: /dev/sdb model: WDC_WDS200T2B0B size: 2000.4GB
           Optical: No optical drives detected.
Partition: ID-1: / size: 1.8T used: 328G (19%) fs: ext4 dev: /dev/sdb1
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 46.5C mobo: N/A
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 253 Uptime: 15 min Memory: 3156.9/15910.0MB
           Init: systemd runlevel: 5 Gcc sys: 7.3.0
           Client: Shell (bash 4.4.191) inxi: 2.3.56
Old 10-20-2018, 01:31 PM   #2
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If you are using UEFI for MSWindows, you would be better off using it for your Linux installation too, that way you should get the option to boot either O/S at start up.
Old 10-20-2018, 02:05 PM   #3
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If you have both Mint and windows 10 installed UEFI, you should be able to simply boot Mint and open a terminal and run the command:

sudo update-grub
Watch the output for a windows entry. If you have Mint installed in Legacy mode and windows EFI, I doubt very much Grub will get a menuentry for the windows or if it does, that it will boot.

You can run this command from a terminal in Mint and post the output. This will tell you whether Mint is EFI or Legacy.

[ -d /sys/firmware/efi ] && echo "EFI boot on HDD" || echo "Legacy boot on HDD"


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