Have been using fedora since version 14 from my early college days, the most liked thing about fedora was the faster boot time compared to other flavous of linux distributions.
I am using a old laptop having intel core 2 duo processor , 4GB ram , intel gm965 chipset, from fedora 24 there is something unusual boot times are terribly slow taking more than 3 minutes.
Here is a boot time report generated from systemd, its taking nearly 5 minutes to complete the systemd boot process.
#sudo systemd-analyze Startup finished in 2.594s (kernel) + 2min 7.113s (initrd) + 2min 2.870s (userspace) = 4min 12.578s
Inspecitng dmesg logs shows error
[ 414.687273] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:41:pipe B] flip_done timed out
[ 424.927280] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:35:plane B] flip_done timed out
After browsing google found out this a bug with xorg
a detailed info about the bug can be found at
https://bugzilla.redhat.com/show_bug.cgi?id=1398424
Fixing the issue now.
#Getting the error from dmesg command.
#dmesg [ 414.687273] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:41:pipe B] flip_done timed out [ 424.927280] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:35:plane B] flip_done timed out
#Checking boot time
#sudo systemd-analyze Startup finished in 2.594s (kernel) + 2min 7.113s (initrd) + 2min 2.870s (userspace) = 4min 12.578s #sudo systemd-analyze blame 1min 33.835s dracut-initqueue.service 1min 15.467s plymouth-quit-wait.service 26.412s initrd-cleanup.service 26.400s plymouth-switch-root.service 26.370s dkms.service 20.990s cups.service 18.168s NetworkManager-wait-online.service 15.860s colord.service 15.745s firewalld.service 14.310s libvirtd.service 14.127s accounts-daemon.service 10.943s lvm2-monitor.service 10.825s lircd-setup.service 10.789s systemd-udev-settle.service 10.080s dev-sdb3.device 9.135s sensord.service 8.534s NetworkManager.service 7.596s ModemManager.service 6.745s rpc-statd-notify.service 6.637s polkit.service 5.678s initrd-switch-root.service 5.658s unbound-anchor.service 4.870s systemd-journal-flush.service 4.473s systemd-logind.service 4.426s lm_sensors.service 4.148s gssproxy.service 4.104s akmods.service 4.101s livesys.service 3.846s udisks2.service 3.829s wpa_supplicant.service 3.814s rtkit-daemon.service 3.807s avahi-daemon.service 3.803s bluetooth.service 3.632s ksm.service 3.631s systemd-fsck-root.service 3.455s netcf-transaction.service 2.911s dnf-makecache.service 2.864s systemd-udevd.service 2.733s fedora-readonly.service 2.435s systemd-tmpfiles-setup-dev.service 1.677s upower.service 1.393s systemd-vconsole-setup.service 948ms lightdm.service 915ms auditd.service 874ms systemd-random-seed.service 789ms chronyd.service
We need to make changes to grub2 adding video=SVIDEO-1:d to make error go away
#lets check the boot time after modifications, well the time has reduced to just about a minute
#sudo systemd-analyze Startup finished in 2.595s (kernel) + 4.526s (initrd) + 1min 2.493s (userspace) = 1min 9.615s
systemd-analyze critical-chain The time after the unit is active or started is printed after the "@" character. The time the unit takes to start is printed after the "+" character. graphical.target @53.018s └─multi-user.target @53.017s └─libvirtd.service @31.849s +14.344s └─network.target @31.834s └─wpa_supplicant.service @36.707s +988ms └─dbus.service @16.916s └─basic.target @16.516s └─sockets.target @16.516s └─virtlockd.socket @16.515s └─sysinit.target @16.488s └─systemd-update-utmp.service @16.444s +43ms └─auditd.service @15.570s +871ms └─local-fs.target @14.849s └─media-data.mount @14.767s +81ms └─local-fs-pre.target @14.710s └─lvm2-monitor.service @4.011s +10.188s └─lvm2-lvmetad.service @4.656s └─lvm2-lvmetad.socket @3.917s └─-.slice
Additionally if you are not using lvm you can disable services like lvm2-monitor.service systemd-udev-settle.service NetworkManager-wait-online.service to optimmize boot times further.