Raspberry Pi 4の起動を速くする で systemd-networkd-wait-online.service の待ち時間を設定してsshログインまでの時間を短縮しましたが、まだ少し引っかかっているように感じました。
$ dmesg コマンドで起動ログを見ると最後の方のメッセージ
new mount options do not match the existing superblock, will be ignored
の部分に問題があるように見えます。
9.890837] [drm] No displays found. Consider forcing hotplug if HDMI is attached [ 9.890918] vc4-drm soc:gpu: bound fe600000.firmwarekms (ops vc4_fkms_ops [vc4]) [ 9.891516] [drm] Initialized vc4 0.0.0 20140616 for soc:gpu on minor 1 [ 9.891527] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 9.891535] [drm] No driver support for vblank timestamp query. [ 9.891543] [drm] Setting vblank_disable_immediate to false because get_vblank_timestamp == NULL [ 10.077791] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 10.077814] brcmfmac: power management disabled [ 14.660172] bcmgenet: Skipping UMAC reset [ 14.736631] bcmgenet fd580000.genet: configuring instance for external RGMII (no delay) [ 14.737627] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 15.477150] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 15.744255] bcmgenet fd580000.genet eth0: Link is Down [ 35.592464] new mount options do not match the existing superblock, will be ignored [ 35.692189] fuse init (API version 7.27) [ 36.570560] squashfs: version 4.0 (2009/01/31) Phillip Lougher [ 50.370451] uart-pl011 fe201000.serial: no DMA platform data [ 51.510633] Bluetooth: Core ver 2.22 [ 51.510703] NET: Registered protocol family 31 [ 51.510707] Bluetooth: HCI device and connection manager initialized [ 51.510720] Bluetooth: HCI socket layer initialized [ 51.510727] Bluetooth: L2CAP socket layer initialized [ 51.510750] Bluetooth: SCO socket layer initialized [ 51.522036] Bluetooth: HCI UART driver ver 2.3 [ 51.522046] Bluetooth: HCI UART protocol H4 registered [ 51.522092] Bluetooth: HCI UART protocol Three-wire (H5) registered [ 51.522233] Bluetooth: HCI UART protocol Broadcom registered [ 51.630262] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 51.630269] Bluetooth: BNEP filters: protocol multicast [ 51.630280] Bluetooth: BNEP socket layer initialized [ 51.655868] cryptd: max_cpu_qlen set to 1000
色々と試行錯誤してみましたがこの件は解決しませんでした、＆実害はないようなのでペンディングとします。
不要なサービスを止める
ログをみると使わないサービスがたくさん起動しているので、これらを止めることにします。
参考サイト ： Linux-不要デーモンの停止-
現在のサービス状態一覧
pi4@pi:~$ systemctl list-unit-files -t service | grep enabled accounts-daemon.service enabled anacron.service enabled apparmor.service enabled atd.service enabled autovt@.service enabled avahi-daemon.service enabled binfmt-support.service enabled blk-availability.service enabled bluetooth.service enabled cloud-config.service enabled cloud-final.service enabled cloud-init-local.service enabled cloud-init.service enabled console-setup.service enabled cron.service enabled cups-browsed.service enabled cups.service enabled dbus-fi.w1.wpa_supplicant1.service enabled dbus-org.bluez.service enabled dbus-org.freedesktop.Avahi.service enabled dbus-org.freedesktop.ModemManager1.service enabled dbus-org.freedesktop.resolve1.service enabled ebtables.service enabled getty@.service enabled haveged.service enabled irqbalance.service enabled iscsi.service enabled kerneloops.service enabled keyboard-setup.service enabled lm-sensors.service enabled lvm2-monitor.service enabled lxcfs.service enabled lxd-containers.service enabled ModemManager.service enabled networkd-dispatcher.service enabled networking.service enabled ondemand.service enabled open-iscsi.service enabled openvpn.service enabled pollinate.service enabled pppd-dns.service enabled rc-local.service enabled-runtime rc.local.service enabled-runtime rsync.service enabled rsyslog.service enabled setvtrgb.service enabled snapd.autoimport.service enabled snapd.core-fixup.service enabled snapd.seeded.service enabled snapd.service enabled snapd.system-shutdown.service enabled spacenavd.service enabled spice-vdagent.service enabled spice-vdagentd.service enabled ssh.service enabled sshd.service enabled syslog.service enabled systemd-fsck-root.service enabled-runtime systemd-networkd-wait-online.service enabled systemd-networkd.service enabled systemd-resolved.service enabled systemd-timesyncd.service enabled udisks2.service enabled ufw.service enabled unattended-upgrades.service enabled whoopsie.service enabled wpa_supplicant.service enabled xrdp-sesman.service enabled xrdp.service enabled
＊をつけたサービスを停止しました。
停止のしかた
$ systemctl disable xxxx.servie
pi4@pi:~$ systemctl list-unit-files -t service | grep enabled accounts-daemon.service enabled anacron.service enabled apparmor.service enabled atd.service enabled autovt@.service enabled * avahi-daemon.service enabled binfmt-support.service enabled blk-availability.service enabled bluetooth.service enabled *cloud-config.service enabled *cloud-final.service enabled *cloud-init-local.service enabled *cloud-init.service enabled console-setup.service enabled cron.service enabled cups-browsed.service enabled *cups.service enabled dbus-fi.w1.wpa_supplicant1.service enabled dbus-org.bluez.service enabled dbus-org.freedesktop.Avahi.service enabled dbus-org.freedesktop.ModemManager1.service enabled dbus-org.freedesktop.resolve1.service enabled ebtables.service enabled getty@.service enabled haveged.service enabled irqbalance.service enabled iscsi.service enabled kerneloops.service enabled keyboard-setup.service enabled lm-sensors.service enabled lvm2-monitor.service enabled lxcfs.service enabled lxd-containers.service enabled *ModemManager.service enabled networkd-dispatcher.service enabled networking.service enabled ondemand.service enabled open-iscsi.service enabled openvpn.service enabled pollinate.service enabled pppd-dns.service enabled rc-local.service enabled-runtime rc.local.service enabled-runtime *rsync.service enabled rsyslog.service enabled setvtrgb.service enabled snapd.autoimport.service enabled snapd.core-fixup.service enabled snapd.seeded.service enabled snapd.service enabled snapd.system-shutdown.service enabled spacenavd.service enabled spice-vdagent.service enabled spice-vdagentd.service enabled ssh.service enabled sshd.service enabled syslog.service enabled systemd-fsck-root.service enabled-runtime systemd-networkd-wait-online.service enabled systemd-networkd.service enabled systemd-resolved.service enabled systemd-timesyncd.service enabled udisks2.service enabled ufw.service enabled unattended-upgrades.service enabled whoopsie.service enabled wpa_supplicant.service enabled xrdp-sesman.service enabled xrdp.service enabled
結果、起動が少し速くなりました
new mount options do not match the existing superblock, will be ignoredの件は起動の邪魔をしていなかったみたいです。
[ 8.583358] bcm2835-codec bcm2835-codec: Loaded V4L2 isp [ 8.984497] cfg80211: Loading compiled-in X.509 certificates for regulatory database [ 9.037305] [drm] Initialized v3d 1.0.0 20180419 for fec00000.v3d on minor 0 [ 9.049137] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7' [ 9.116611] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 9.142182] random: crng init done [ 9.142194] random: 7 urandom warning(s) missed due to ratelimiting [ 9.160326] brcmfmac: F1 signature read @0x18000000=0x15264345 [ 9.169534] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6 [ 9.375735] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned. [ 9.389633] usbcore: registered new interface driver brcmfmac [ 9.392982] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6 [ 9.406436] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Feb 27 2018 03:15:32 version 7.45.154 (r684107 CY) FWID 01-4fbe0b04 [ 9.432268] bcm2835_audio soc:audio: card created with 8 channels [ 9.609735] [drm] No displays found. Consider forcing hotplug if HDMI is attached [ 9.609821] vc4-drm soc:gpu: bound fe600000.firmwarekms (ops vc4_fkms_ops [vc4]) [ 9.610929] [drm] Initialized vc4 0.0.0 20140616 for soc:gpu on minor 1 [ 9.610941] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 9.610950] [drm] No driver support for vblank timestamp query. [ 9.610958] [drm] Setting vblank_disable_immediate to false because get_vblank_timestamp == NULL [ 9.751937] Adding 8388604k swap on /swap. Priority:-2 extents:9 across:8929280k FS [ 9.809645] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 9.809727] brcmfmac: power management disabled [ 10.490937] bcmgenet: Skipping UMAC reset [ 10.564792] bcmgenet fd580000.genet: configuring instance for external RGMII (no delay) [ 10.565811] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 10.738161] new mount options do not match the existing superblock, will be ignored [ 10.799728] fuse init (API version 7.27) [ 11.584242] bcmgenet fd580000.genet eth0: Link is Down [ 12.186645] squashfs: version 4.0 (2009/01/31) Phillip Lougher [ 15.256928] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 25.619461] uart-pl011 fe201000.serial: no DMA platform data [ 26.754836] Bluetooth: Core ver 2.22 [ 26.754887] NET: Registered protocol family 31 [ 26.754891] Bluetooth: HCI device and connection manager initialized [ 26.754909] Bluetooth: HCI socket layer initialized [ 26.754916] Bluetooth: L2CAP socket layer initialized [ 26.754936] Bluetooth: SCO socket layer initialized [ 26.764134] Bluetooth: HCI UART driver ver 2.3 [ 26.764151] Bluetooth: HCI UART protocol H4 registered [ 26.764232] Bluetooth: HCI UART protocol Three-wire (H5) registered [ 26.764385] Bluetooth: HCI UART protocol Broadcom registered