Your system information

• Steam client version (build number or date): Dec 20 2020 at 23:07:25
• Distribution (e.g. Ubuntu): Debian 10
• Opted into Steam client beta?: [Yes/No] Yes
• Have you checked for system updates?: [Yes/No] Yes

Please describe your issue in as much detail as possible:

After installation of Farming Simulator 19 first time the game launched normally, but after I quit a game the synchronizing cloud started and never ended until I killed the client (SIGKILL). Now every time I select this game in a steam client the endless cloud sync starts again and I'm not able to start Farming Simulator or any game because of that. I think it cannot be the problem of my bandwidth because I've waited for an hour or more and my bandwidth is pretty good. Restarting/reinstalling steam doesn't help as well, as trying both the Debian repository and steam repository builds.

I have tried:

1. Turn off cloud sync
2. Reinstalling game
3. Reinstalling steam
4. Beta steam
5. Installing steam from debian/steam repos
6. Clear all files, which starts with the game ID (787860*)
7. Different proton versions

I bit of exploration showed the following, when I select the game:

1. The htop shows, that one of my processor's core is 100% loaded, and about 90% of it is busy in kernel calls
2. Steam doesn't print any errors in stdout when launched from tty
3. The strace shows, that steam writes some data into librarycache file, closes it, and calls for futex 3 times. Exact log of this strace part:
   gettid() = 3578
   gettid() = 3578
   gettid() = 3578
   gettid() = 3578
   gettid() = 3578
   gettid() = 3578
   kill(3586, 0) = 0
   access("/home/username/.local/share/Steam/userdata/167164840/config/librarycache", F_OK) = 0
   lstat64("/home/username/.local/share/Steam/userdata/167164840/config/librarycache", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
   access("/home/username/.local/share/Steam/userdata/167164840/config/librarycache/787860.json", F_OK) = 0
   openat(AT_FDCWD, "/home/username/.local/share/Steam/userdata/167164840/config/librarycache/787860.json", O_WRONLY|O_CREAT|O_TRUNC|O_LARGEFILE, 0777) = 127
   write(127, "[["badge",{"version":1,"data":{""..., 10751) = 10751
   close(127) = 0
   futex(0xef6624a4, FUTEX_WAKE, 1) = 1
   futex(0xef6624a4, FUTEX_WAKE, 1) = 1
   futex(0xef6624a4, FUTEX_WAKE, 1) = 1
   access("/home/username/.local/share/Steam/userdata/167164840/config/librarycache", F_OK) = 0
   lstat64("/home/username/.local/share/Steam/userdata/167164840/config/librarycache", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
   access("/home/username/.local/share/Steam/userdata/167164840/config/librarycache/787860.json", F_OK) = 0
   openat(AT_FDCWD, "/home/username/.local/share/Steam/userdata/167164840/config/librarycache/787860.json", O_WRONLY|O_CREAT|O_TRUNC|O_LARGEFILE, 0777) = 127
   write(127, "[["badge",{"version":1,"data":{""..., 10751) = 10751
   close(127) = 0
   futex(0xef6624a4, FUTEX_WAKE, 1) = 1
   futex(0xef6624a4, FUTEX_WAKE, 1) = 0
   futex(0xef6624a4, FUTEX_WAKE, 1) = 0
   getpid() = 3578
   getpid() = 3578
   mmap2(NULL, 1866816, PROT_READ|PROT_WRITE, MAP_SHARED, 90, 0x83e000) = 0xdeb38000
   madvise(0xdeb38000, 1866816, MADV_DONTFORK) = 0
   munmap(0xdeb38000, 1866816) = 0
   poll([{fd=35, events=POLLIN}], 1, 0) = 0 (Timeout)
   recvmsg(28, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable)
   recvmsg(28, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable)
   poll([{fd=28, events=POLLIN}, {fd=29, events=POLLIN}], 2, 50) = 1 ([{fd=29, revents=POLLIN}])
   read(29, "\1\0\0\0\0\0\0\0", 8) = 8
   getpid() = 3578
   poll([{fd=28, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=28, revents=POLLOUT}])
   writev(28, [{iov_base="\3\0\2\0!\0`\3\16\1\2\0!\0`\3", iov_len=16}, {iov_base=NULL, iov_len=0}, {iov_base="", iov_len=0}], 3) = 16
   poll([{fd=28, events=POLLIN}], 1, -1) = 1 ([{fd=28, revents=POLLIN}])
   recvmsg(28, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\352\v\3\0\0\0'\0\0\0\1\0\1\1\377\377\377\377\0\0\0\0\0\0\2\0 \0`\3"..., iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 76
   getpid() = 3578
   getpid() = 3578
   getpid() = 3578
   getpid() = 3578
   getpid() = 3578
   getpid() = 3578
   getpid() = 3578
   getpid() = 3578

Steps for reproducing this issue:

1. Install Farming Simulator 19
2. Launch and play a bit of tutorial
3. Close game
4. Game will fall into endless cloud sync

System information:

https://gist.github.com/Blinkop/57ab12b6b8f457c4110bb5b457b6db11