X11 freezes
X11 always freezes when I'm playing Bzflag and sometimes (but more rarely) when I'm doing something else. It's aleatory. Sometimes BZflag quit, sometimes I can use CTRL-ALT-F1 keys and kill BZflag, sometimes I can only reboot with magic keys.
In /var/log/syslog and in /var/log/kern.log :
Sep 23 21:10:37 ordinateur kernel: [11644.276121] [UFW BLOCK] IN=eno1 OUT= MAC=01:00:5e:00:00:01:44:a6:1e:7f:af:f6:08:00 SRC=192.168.1.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0x80 TTL=1 ID=0 DF PROTO=2. Sep 23 21:10:50 ordinateur kernel: [11657.235954] nouveau 0000:05:00.0: Xorg[1307]: Unknown handle 0x00000000 Sep 23 21:10:50 ordinateur kernel: [11657.235959] nouveau 0000:05:00.0: Xorg[1307]: validate_init Sep 23 21:10:50 ordinateur kernel: [11657.235960] nouveau 0000:05:00.0: Xorg[1307]: validate: -2
In /var/log/apport.log :
ERROR: apport (pid 12123) Wed Sep 23 21:10:50 2020: called for pid 11959, signal 11, core limit 0, dump mode 1 ERROR: apport (pid 12123) Wed Sep 23 21:10:50 2020: executable: /usr/games/bzflag (command line "/usr/games/bzflag") ERROR: apport (pid 12123) Wed Sep 23 21:10:50 2020: debug: session gdbus call: (true,) ERROR: apport (pid 12123) Wed Sep 23 21:10:56 2020: wrote report /var/crash/_usr_games_bzflag.1000.crash
I'm using Linux Mint 20 Cinnamon 64 bits.