это видел?
Earlier versions of the NVIDIA proprietary driver (tested with GeForce GTX 970, driver: nvidia 370) accepts GRUB_GFXMODE in format <width>x<height>-<depth> (e.g. 1920x1200-24, but not 1920x1200x24). This does not appear to apply to newer cards and drivers. Pascal cards with more recent drivers (tested with GeForce GTX 1060 and nvidia 381.22) will not work with the suggested format and attempting to use it results in serious issues, including but not limited to system crashes and hard locks. The current driver and cards are best configured with GRUB_GFXMODE in the standard <width>x<height>x<depth> format.