I have a suggestion for you. Try to remove "20-archlinux.item" from "/etc/bootmenu.d/", and then create a new, lets say "21-archlinux.item" file again. Also try to type the configuration manually, not just copy-paste, while paying attention there are no mistakes.
localhost login: [ 4.377685] omap_12c omap_12c.2: controller timed out [ 4.784729] bcm2048 3-0022: BCM 12C error! [ 4.786285] bcm2048 3-0022: Is Bluetooth up and running? [ 5.885070] tpa6130a2 2-0060: Write failed [ 5.885253] tpa6130a2 2-0060: Failed to initialize chip [ 5.932525] et8ek8 3-003e: read from offset 0x1263 error -121 [ 5.933380] isp_register_subdev_group: Unable to register subdev et8e8 [ 6.032714] EXT4-fs (mmcblk0p4): unable to read superblock [ 6.034698] smia-sensor 2-0010: read from offset 0x0 error -121 [ 6.102020] EXT4-fs (mmcblk0p4): unable to read superblock [ 6.110565] EXT4-fs (mmcblk0p4): unable to read superblock [ 6.390136] rx51-audio rx51-audio: asoc: failed to init TLV320AIC34: -19 [ 6.390411] asoc: failed to instantiate card RX-51: -19 [ 6.405364] rx-51-audio rx51-audio: snd_soc_register_card failed (-19)