It appears one of your hard disks is failing and causing long delays in
the kernel:
[ 1137.804251] ata3: exception Emask 0x10 SAct 0x0 SErr 0x4000000 action 0xe
frozen
[ 1137.804258] ata3: irq_stat 0x00000040, connection status changed
[ 1137.804264] ata3: SError: { DevExch }
[ 1137.804273] ata3: hard resetting link
[ 1140.032186] ata3: COMRESET failed (errno=-32)
[ 1140.032197] ata3: reset failed (errno=-32), retrying in 8 secs
[ 1147.868122] ata3: hard resetting link
[ 1150.164114] ata3: COMRESET failed (errno=-32)
[ 1150.164124] ata3: reset failed (errno=-32), retrying in 8 secs
[ 1158.108161] ata3: hard resetting link
[ 1160.336143] ata3: COMRESET failed (errno=-32)
[ 1160.336153] ata3: reset failed (errno=-32), retrying in 33 secs
[ 1194.972119] ata3: hard resetting link
[ 1197.632151] ata3: COMRESET failed (errno=-32)
[ 1197.632163] ata3: reset failed, giving up
[ 1197.632173] ata3: EH complete
Please try booting Ubuntu from USB to see if that avoids the problem:
http://releases.ubuntu.com/18.04
If so then it sounds like you will need to replace a hard disk.
** Package changed: xorg (Ubuntu) => ubuntu
** Changed in: ubuntu
Status: New => Incomplete
** Tags added: performance
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https://bugs.launchpad.net/bugs/1818949
Title:
a lot of time consume to open ubuntu
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