** Description changed:

- This is happening in Hirsute quite easily, just move around a firefox
- (or any other x11 window) around, hitting the shell edges and you'll get
- all freezing with Xwayland process at 100%.
+ This is happening in Hirsute (running in vmware player) quite easily,
+ just move around a firefox (or any other x11 window) around, hitting the
+ shell edges and you'll get all freezing with Xwayland process at 100%.
  
  Hangs seems to have this trace:
  
  0x000055b9abfb69b1 in xwl_screen_post_damage (xwl_screen=0x55b9ac423dd0) at 
../../../../../hw/xwayland/xwayland.c:869
  869   ../../../../../hw/xwayland/xwayland.c: No such file or directory.
  (gdb) bt
  #0  0x000055b9abfb69b1 in xwl_screen_post_damage (xwl_screen=0x55b9ac423dd0) 
at ../../../../../hw/xwayland/xwayland.c:869
  #1  block_handler (data=0x55b9ac423dd0, timeout=<optimized out>) at 
../../../../../hw/xwayland/xwayland.c:1037
  #2  0x000055b9ac0ecf3e in BlockHandler 
(pTimeout=pTimeout@entry=0x7ffdc8574204) at ../../../../dix/dixutils.c:388
  #3  0x000055b9ac119a52 in WaitForSomething (are_ready=0) at 
../../../../os/WaitFor.c:201
  #4  0x000055b9ac0e8297 in Dispatch () at ../../../../dix/dispatch.c:421
  #5  0x000055b9ac0ec5a4 in dix_main (argc=16, argv=0x7ffdc85743e8, 
envp=<optimized out>) at ../../../../dix/main.c:276
- #6  0x00007f5ab299d565 in __libc_start_main (main=0x55b9abfb5a80 <main>, 
argc=16, argv=0x7ffdc85743e8, init=<optimized out>, 
-     fini=<optimized out>, rtld_fini=<optimized out>, 
stack_end=0x7ffdc85743d8) at ../csu/libc-start.c:332
+ #6  0x00007f5ab299d565 in __libc_start_main (main=0x55b9abfb5a80 <main>, 
argc=16, argv=0x7ffdc85743e8, init=<optimized out>,
+     fini=<optimized out>, rtld_fini=<optimized out>, 
stack_end=0x7ffdc85743d8) at ../csu/libc-start.c:332
  #7  0x000055b9abfb5abe in _start ()
  
  (gdb) info local
  xwl_window = 0x55b9acbf18f0
  next_xwl_window = 0x7ffdc8574150
  commit_window_list = {next = 0x55b9acbf1910, prev = 0x55b9acbf1910}
  xwl_window = <optimized out>
  next_xwl_window = <optimized out>
  commit_window_list = {next = <optimized out>, prev = <optimized out>}
- 
  
  (gdb) print commit_window_list
  $1 = {next = 0x55b9acbf1910, prev = 0x55b9acbf1910}
  (gdb) print commit_window_list->next
  $2 = (struct xorg_list *) 0x55b9acbf1910
  (gdb) print commit_window_list->next->next
  $3 = (struct xorg_list *) 0x7ffdc8574170
  (gdb) print commit_window_list->next->next->next
  $4 = (struct xorg_list *) 0x55b9acbf1910
  (gdb) print commit_window_list->next->next->next->next
  $5 = (struct xorg_list *) 0x7ffdc8574170
  (gdb) print commit_window_list->next->next->next->next->next
  $6 = (struct xorg_list *) 0x55b9acbf1910
  (gdb) print commit_window_list->next->next->next->next->next->next
  $7 = (struct xorg_list *) 0x7ffdc8574170

** Tags added: rls-hh-incoming

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https://bugs.launchpad.net/bugs/1915449

Title:
  XWayland hangs at 100% of CPU causing gnome-shell to hang

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