Black screen in GRUB via DisplayPort

My PC specs: - Motherboard: Asus Maximus V Gene - CPU: Intel Core i7 3770 - GPU: nVidia GeForce GTX 780 Ti - Monitor: SAMSUNG C27JG50QQI 27" 144Hz OS: - Arch Linux 5.3.7-arch1-1-ARCH I have to use DisplayPort connection, because my GPU can provide 144 Hz frequency only thru this connection. My problem is that I can't see anything on monitor until OS booted. But when GRUB loaded I can see black screen with backlight. Monitor works (power led not blinking), but it shows nothing. When OS loaded, everything works perfect. If I try to connect second monitor via HDMI, DP-monitor will sleep (power led is blinking) until OS booted; and on the second (HDMI) monitor I can see everything: BIOS, GRUB, etc. The problem manifests itself exclusively when connected via DisplayPort. Any other GPU interfaces works well. BIOS mode is UEFI and Legacy both enabled. Motherboard and GPU BIOS is default and I don't want to update them. I dont't need to change BIOS settings regulary, but I want to see GRUB menu. How can I try to configure GRUB to load any driver or special mode to fix this problem? Here is my current GRUB config: # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### insmod part_gpt insmod part_msdos if [ -s $prefix/grubenv ]; then load_env fi if [ "${next_entry}" ] ; then set default="${next_entry}" set next_entry= save_env next_entry set boot_once=true else set default="0" fi if [ x"${feature_menuentry_id}" = xy ]; then menuentry_id_option="--id" else menuentry_id_option="" fi export menuentry_id_option if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function load_video { if [ x$feature_all_video_module = xy ]; then insmod all_video else insmod efi_gop insmod efi_uga insmod ieee1275_fb insmod vbe insmod vga insmod video_bochs insmod video_cirrus fi } if [ x$feature_default_font_path = xy ] ; then font=unicode else insmod part_msdos insmod ext2 set root='hd0,msdos5' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,msdos5' --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 64927bd4-fea7-4e9c-9a30-18bd16b6f52a else search --no-floppy --fs-uuid --set=root 64927bd4-fea7-4e9c-9a30-18bd16b6f52a fi font="/usr/share/grub/unicode.pf2" fi if loadfont $font ; then set gfxmode=auto load_video insmod gfxterm set locale_dir=$prefix/locale set lang=en_US insmod gettext fi terminal_input console terminal_output gfxterm insmod part_msdos insmod ext2 set root='hd0,msdos5' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,msdos5' --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 64927bd4-fea7-4e9c-9a30-18bd16b6f52a else search --no-floppy --fs-uuid --set=root 64927bd4-fea7-4e9c-9a30-18bd16b6f52a fi insmod gfxmenu loadfont ($root)/boot/grub/themes/Vimix/unifont-regular-16.pf2 insmod jpeg insmod png set theme=($root)/boot/grub/themes/Vimix/theme.txt export theme if [ x$feature_timeout_style = xy ] ; then set timeout_style=menu set timeout=5 # Fallback normal timeout code in case the timeout_style feature is # unavailable. else set timeout=5 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/10_linux ### menuentry 'Arch Linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-64927bd4-fea7-4e9c-9a30-18bd16b6f52a' { load_video set gfxpayload=keep insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos5' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,msdos5' --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 64927bd4-fea7-4e9c-9a30-18bd16b6f52a else search --no-floppy --fs-uuid --set=root 64927bd4-fea7-4e9c-9a30-18bd16b6f52a fi echo 'Loading Linux linux ...' linux /boot/vmlinuz-linux root=UUID=64927bd4-fea7-4e9c-9a30-18bd16b6f52a rw quiet video=DP-1:e echo 'Loading initial ramdisk ...' initrd /boot/intel-ucode.img /boot/initramfs-linux.img } submenu 'Advanced options for Arch Linux' $menuentry_id_option 'gnulinux-advanced-64927bd4-fea7-4e9c-9a30-18bd16b6f52a' { menuentry 'Arch Linux, with Linux linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-64927bd4-fea7-4e9c-9a30-18bd16b6f52a' { load_video set gfxpayload=keep insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos5' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,msdos5' --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 64927bd4-fea7-4e9c-9a30-18bd16b6f52a else search --no-floppy --fs-uuid --set=root 64927bd4-fea7-4e9c-9a30-18bd16b6f52a fi echo 'Loading Linux linux ...' linux /boot/vmlinuz-linux root=UUID=64927bd4-fea7-4e9c-9a30-18bd16b6f52a rw quiet video=DP-1:e echo 'Loading initial ramdisk ...' initrd /boot/intel-ucode.img /boot/initramfs-linux.img } menuentry 'Arch Linux, with Linux linux (fallback initramfs)' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-fallback-64927bd4-fea7-4e9c-9a30-18bd16b6f52a' { load_video set gfxpayload=keep insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos5' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,msdos5' --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 64927bd4-fea7-4e9c-9a30-18bd16b6f52a else search --no-floppy --fs-uuid --set=root 64927bd4-fea7-4e9c-9a30-18bd16b6f52a fi echo 'Loading Linux linux ...' linux /boot/vmlinuz-linux root=UUID=64927bd4-fea7-4e9c-9a30-18bd16b6f52a rw quiet video=DP-1:e echo 'Loading initial ramdisk ...' initrd /boot/initramfs-linux-fallback.img } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. menuentry "Windows 10" --class windows --class os { insmod ntfs set root='(hd0,1)' search --no-floppy --fs-uuid --set E2D01551D0152CF3 chainloader +1 } ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f ${config_directory}/custom.cfg ]; then source ${config_directory}/custom.cfg elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ###