And here I ran journalctl -r when Libreoffice was freezing

- Logs begin at Mon 2018-07-23 09:44:27 WEST, end at Mon 2018-07-23 10:42:53 WEST. --
Jul 23 10:42:53 debian sudo[4813]: pam_unix(sudo:session): session opened for user root by (uid=0)
Jul 23 10:42:53 debian sudo[4813]: debian : TTY=pts/1 ; PWD=/home/debian/Downloads ; USER=root ; COMMAND=/bin/journalctl -r
Jul 23 10:42:50 debian kernel: nouveau 0000:01:00.0: DRM: suspending kernel object tree...
Jul 23 10:42:50 debian kernel: nouveau 0000:01:00.0: DRM: suspending client object trees...
Jul 23 10:42:50 debian kernel: nouveau 0000:01:00.0: DRM: waiting for kernel channels to go idle...
Jul 23 10:42:50 debian kernel: nouveau 0000:01:00.0: DRM: evicting buffers...
Jul 23 10:42:44 debian kernel: nouveau 0000:01:00.0: DRM: resuming client object trees...
Jul 23 10:42:44 debian kernel: nouveau 0000:01:00.0: priv: HUB0: 10ecc0 ffffffff (1940822c)
Jul 23 10:42:44 debian kernel: nouveau 0000:01:00.0: priv: HUB0: 6013d4 ffff573f (1f408200)
Jul 23 10:42:44 debian kernel: nouveau 0000:01:00.0: DRM: resuming kernel object tree...
Jul 23 10:42:43 debian wpa_supplicant[641]: wlp3s0: Reject scan trigger since one is already pending
Jul 23 10:42:43 debian NetworkManager[573]: <info> [1532338963.0308] device (wlp3s0): supplicant interface state: disabled -> inactive
Jul 23 10:42:43 debian org.gnome.Shell.desktop[857]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x2200b4b (debian@kr)
Jul 23 10:42:43 debian NetworkManager[573]: <info> [1532338963.0141] device (wlp3s0): supplicant interface state: inactive -> disabled
Jul 23 10:42:43 debian kernel: IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
Jul 23 10:42:33 debian kernel: [<ffffffffaca14bce>] ? entry_SYSCALL_64_after_swapgs+0x58/0xc6
Jul 23 10:42:33 debian kernel: [<ffffffffac403b7d>] ? do_syscall_64+0x8d/0xf0
Jul 23 10:42:33 debian kernel: [<ffffffffac8efce1>] ? __sys_sendmsg+0x51/0x90
Jul 23 10:42:33 debian kernel: [<ffffffffac61fe78>] ? dput+0xc8/0x250
Jul 23 10:42:33 debian kernel: [<ffffffffac7394ee>] ? memzero_explicit+0xe/0x10
Jul 23 10:42:33 debian kernel: [<ffffffffac84ac71>] ? _crng_backtrack_protect+0x31/0x70
Jul 23 10:42:33 debian kernel: [<ffffffffac8ef3d8>] ? ___sys_sendmsg+0x2c8/0x2e0
Jul 23 10:42:33 debian kernel: [<ffffffffac8ee946>] ? sock_sendmsg+0x36/0x40
Jul 23 10:42:33 debian kernel: [<ffffffffac943b67>] ? netlink_sendmsg+0x357/0x3b0
Jul 23 10:42:33 debian kernel: [<ffffffffac94376a>] ? netlink_unicast+0x18a/0x230
Jul 23 10:42:33 debian kernel: [<ffffffffac91df04>] ? rtnetlink_rcv+0x24/0x30
Jul 23 10:42:33 debian kernel: [<ffffffffac943d94>] ? netlink_rcv_skb+0xa4/0xc0
Jul 23 10:42:33 debian kernel: [<ffffffffac923460>] ? rtnl_newlink+0x880/0x880
Jul 23 10:42:33 debian kernel: [<ffffffffac923547>] ? rtnetlink_rcv_msg+0xe7/0x220
Jul 23 10:42:33 debian kernel: [<ffffffffac6a91e7>] ? security_capable+0x47/0x60
Jul 23 10:42:33 debian kernel: [<ffffffffac6a66a0>] ? cap_inode_killpriv+0x20/0x20
Jul 23 10:42:33 debian kernel: [<ffffffffac940f5e>] ? __netlink_sendskb+0x3e/0x60
Jul 23 10:42:33 debian kernel: [<ffffffffac9231b2>] ? rtnl_newlink+0x5d2/0x880
Jul 23 10:42:33 debian kernel: [<ffffffffac9befa6>] ? inet6_fill_ifla6_attrs+0x416/0x430
Jul 23 10:42:33 debian kernel: [<ffffffffac75e1dc>] ? __nla_put+0xc/0x20
Jul 23 10:42:33 debian kernel: [<ffffffffac75e0b8>] ? __nla_reserve+0x38/0x50
Jul 23 10:42:33 debian kernel: [<ffffffffac91e84c>] ? do_setlink+0x32c/0xd60
Jul 23 10:42:33 debian kernel: [<ffffffffac90ff13>] ? dev_change_flags+0x23/0x60
Jul 23 10:42:33 debian kernel: [<ffffffffac90fe2c>] ? __dev_change_flags+0x9c/0x160
Jul 23 10:42:33 debian kernel: [<ffffffffac90fb38>] ? __dev_open+0xc8/0x140
Jul 23 10:42:33 debian kernel: [<ffffffffc0af624a>] ? ieee80211_check_concurrent_iface+0x11a/0x1e0 [mac80211]
Jul 23 10:42:33 debian kernel: [<ffffffffc0af7b4d>] ? ieee80211_do_open+0x2ad/0x990 [mac80211]