The machine is a Dell precision M6400 with 16 G of RAM, primary HD 120G SSD Windows 7. Second drive is 500G Toshiba mechanical drive with Linux Mint 64 18 and LXLE 18 in a triple boot. The grub background image is one of the included LXLE wallpapers converted to appropriate sized PNG.

Problem: After a battery swap without power and press of the power button, grub loads normally, IE the background image simply flashes onto the screen along with the menu. The remainder of the boot process continues at what I have come to accept as normal speed, with the scrolling (quickly) boot messages.

BUT, but...once in a while for reasons I can not uncover, GRUB goes into 'slow mode', where the background image slowly fills the screen from bottom to top, as in a slideshow effect. Then the menu and outline do the same. The boot messages are far slower to scroll also, as though the CPU is at 100 percent or something.

This will happen every boot thereafter, until I remove the battery and power cord, and hold the power button briefly. This returns everything to normal for some random number of boots, typically in the range of 5 to 10. Everything seems normal once GRUB is out of the way, and shutdown is normal and very quick, so this is not a show stopper, just a ____ annoyance that is relieving me of my sanity


Thanks

Kirby