我尝试找出窗口冻结的来源，但没有成功：
[andrii@andrii-Aspire-A517-51G ~]$ xprop | awk -F'=' '/_NET_WM_PID/ {print $2}' | xargs ps
PID TTY TIME CMD
8434 pts/0 00:00:00 bash
967972 pts/0 00:00:00 xargs
967991 pts/0 00:00:00 ps
[andrii@andrii-Aspire-A517-51G ~]$ xprop | awk -F'=' '/_NET_WM_PID/ {print $2}'
[andrii@andrii-Aspire-A517-51G ~]$
此外，此^应用程序跳过任务栏。
cat /etc/os-release
NAME="Ubuntu"
VERSION="20.04.2 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.2 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal
wmctrl -l -p -x
X Error of failed request: BadWindow (invalid Window parameter)
Major opcode of failed request: 20 (X_GetProperty)
Resource id in failed request: 0x6a0bec9
Serial number of failed request: 13
Current serial number in output stream: 13
$ wmctrl -m
Name: Openbox
Class:
PID: N/A
Window manager's "showing the desktop" mode: OFF
$ env | grep -i desktop
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session2
DESKTOP_SESSION=plasma
XDG_SESSION_DESKTOP=plasma
XDG_CURRENT_DESKTOP=KDE
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
XDG_DATA_DIRS=/usr/share/plasma:/home/andrii/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share:/var/lib/snapd/desktop
$
xwininfo: Please select the window about which you
would like information by clicking the
mouse in that window.
xwininfo: Window id: 0x44185cd (has no name)
Root window id: 0x9a4 (the root window) (has no name)
Parent window id: 0x9a4 (the root window) (has no name)
55 children:
0x4418619 (has no name): () 1x1+0+0 +401+244
0x4418618 (has no name): () 1x1+0+0 +401+244
0x4418617 (has no name): () 1x1+0+0 +401+244
0x4418616 (has no name): () 1x1+0+0 +401+244
0x4418615 (has no name): () 1x1+0+0 +401+244
0x4418614 (has no name): () 1x1+0+0 +401+244
0x4418613 (has no name): () 1x1+0+0 +401+244
0x4418612 (has no name): () 1x1+0+0 +401+244
0x4418611 (has no name): () 1x1+0+0 +401+244
0x4418610 (has no name): () 1x1+0+0 +401+244
0x441860f (has no name): () 1x1+0+0 +401+244
0x441860e (has no name): () 1x1+0+0 +401+244
0x441860d (has no name): () 1x1+0+0 +401+244
0x441860c (has no name): () 1x1+0+0 +401+244
0x441860b (has no name): () 1x1+0+0 +401+244
0x441860a (has no name): () 1x1+0+0 +401+244
0x4418609 (has no name): () 1x1+0+0 +401+244
0x4418608 (has no name): () 1x1+0+0 +401+244
0x4418607 (has no name): () 1x1+0+0 +401+244
0x4418606 (has no name): () 1x1+0+0 +401+244
0x4418605 (has no name): () 1x1+0+0 +401+244
0x4418604 (has no name): () 1x1+0+0 +401+244
0x4418603 (has no name): () 1x1+0+0 +401+244
0x4418602 (has no name): () 1x1+0+0 +401+244
0x4418601 (has no name): () 1x1+0+0 +401+244
0x4418600 (has no name): () 1x1+0+0 +401+244
0x44185ff (has no name): () 1x1+0+0 +401+244
0x44185fe (has no name): () 1x1+0+0 +401+244
0x44185fd (has no name): () 1x1+0+0 +401+244
0x44185fc (has no name): () 1x1+0+0 +401+244
0x44185fb (has no name): () 1x1+0+0 +401+244
0x44185fa (has no name): () 1x1+0+0 +401+244
0x44185f9 (has no name): () 26x1+1891+1043 +2292+1287
0x44185f8 (has no name): () 26x1+1891+1038 +2292+1282
0x44185f7 (has no name): () 1x25+1917+1019 +2318+1263
0x44185f6 (has no name): () 26x1+1+1043 +402+1287
0x44185f5 (has no name): () 26x1+1+1038 +402+1282
0x44185f4 (has no name): () 1x25+0+1019 +401+1263
0x44185f3 (has no name): () 1864x1+27+1043 +428+1287
0x44185f2 (has no name): () 1864x1+27+1038 +428+1282
0x44185ed (has no name): () 1916x4+1+1039 +402+1283
4 children:
0x44185f1 (has no name): () 1x4+1890+0 +2292+1283
0x44185f0 (has no name): () 1x4+25+0 +427+1283
0x44185ef (has no name): () 25x4+1891+0 +2293+1283
0x44185ee (has no name): () 25x4+0+0 +402+1283
0x44185e5 (has no name): () 1x994+1917+26 +2318+270
0x44185e4 (has no name): () 1x994+0+26 +401+270
0x44185de (has no name): () 1916x1+1+23 +402+267
0x44185dd (has no name): () 1x25+1917+1 +2318+245
0x44185dc (has no name): () 26x1+1892+0 +2293+244
0x44185db (has no name): () 26x1+0+0 +401+244
0x44185da (has no name): () 1866x1+26+0 +427+244
0x44185d9 (has no name): () 1x25+0+1 +401+245
0x44185d8 (has no name): () 1916x22+1+1 +402+245
12 children:
0x44185ec (has no name): () 18x18+1856+2 +2258+247
0x44185eb (has no name): () 20x20+2+1 +404+246
0x44185ea (has no name): () 18x18+0+0 +402+245
0x44185e9 (has no name): () 18x18+0+0 +402+245
0x44185e8 (has no name): () 18x18+1896+2 +2298+247
0x44185e7 (has no name): () 18x18+1876+2 +2278+247
0x44185e6 (has no name): () 1792x20+62+1 +464+246
0x44185e3 (has no name): () 2x22+1914+0 +2316+245
0x44185e2 (has no name): () 25x2+1891+0 +2293+245
0x44185e1 (has no name): () 2x22+0+0 +402+245
0x44185e0 (has no name): () 25x2+0+0 +402+245
0x44185df (has no name): () 1866x2+25+0 +427+245
0x44185d3 (has no name): () 1916x1+1+1037 +402+1281
2 children:
0x44185d5 (has no name): () 26x1+1890+0 +2292+1281
0x44185d4 (has no name): () 26x1+0+0 +402+1281
0x44185d2 (has no name): () 1x1012+1916+25 +2317+269
1 child:
0x44185d7 (has no name): () 1x18+0+994 +2317+1263
0x44185d1 (has no name): () 1916x1+1+24 +402+268
0x44185d0 (has no name): () 1x1012+1+25 +402+269
1 child:
0x44185d6 (has no name): () 1x18+0+994 +402+1263
0x44185ce (has no name): () 1914x1012+2+25 +403+269
1 child:
0x44185cf (has no name): () 1914x1012+0+0 +403+269
Absolute upper-left X: 401
Absolute upper-left Y: 244
Relative upper-left X: 401
Relative upper-left Y: 244
Width: 1918
Height: 1044
Depth: 24
Visual: 0x21
Visual Class: TrueColor
Border width: 0
Class: InputOutput
Colormap: 0x20 (installed)
Bit Gravity State: ForgetGravity
Window Gravity State: NorthWestGravity
Backing Store State: NotUseful
Save Under State: no
Map State: IsViewable
Override Redirect State: no
Corners: +401+244 --399+244 --399--208 +401--208
-geometry 1918x1044+401+244
Bit gravity: ForgetGravity
Window gravity: NorthWestGravity
Backing-store hint: NotUseful
Backing-planes to be preserved: 0xffffffff
Backing pixel: 0
Save-unders: No
Someone wants these events:
ButtonPress
ButtonRelease
EnterWindow
LeaveWindow
SubstructureRedirect
FocusChange
Do not propagate these events:
Override redirection?: No
No window manager hints defined
Window manager hints:
Process id: (unknown)
No normal window size hints defined
No zoom window size hints defined
No window shape defined
No border shape defined
更新。我 xkill 了这个窗口，这是ps faux前后的比较：
https://paste.ubuntu.com/p/2Rf9Kzjpw7/
https://paste.ubuntu.com/p/8rwZySP9Vc/
xwininfo -tree -root | pastebinit
https://paste.ubuntu.com/p/krDy9QwDq3/
（定义 ID 0x44185cd）
xprop -root|grep ^_NET_CLIENT_LIST | pastebinit
https://paste.ubuntu.com/p/FVYhCzkkQj/
wmctrl -l | pastebinit 3 12:57
X Error of failed request: BadWindow (invalid Window parameter)
Major opcode of failed request: 20 (X_GetProperty)
Resource id in failed request: 0x6a0bec9
Serial number of failed request: 13
Current serial number in output stream: 13
You are trying to send an empty document, exiting.
xlsclients | pastebinit
答案1
这是对您的神秘窗口的两步识别。
识别 1a
您可以打开终端并使用
$ xwininfo
这将提示您选择要获取信息的窗口。获得窗口 ID WIN_ID（以及其他信息）后，您可以使用其他标志获取更多信息，或者使用wmctrl，请参阅识别 1b下面。特别是，您可能希望获取进程 ID。如果wmctrl这不起作用，您可以尝试PID使用WIN_ID
$ xprop -id <WIN_ID> | grep _NET_WM_PID (or simply...)
$ xprop -id <WIN_ID> _NET_WM_PID
如果你不这样做，grep你可能会得到其他有趣的信息。根据我的经验，这并不总是能给你带来积极的结果。
也可以看看识别 2以下。
有关的：
- https://unix.stackexchange.com/a/84981/137608
- https://stackoverflow.com/questions/1131277/how-to-convert-a-x11-window-id-to-a-process-id
- 通过窗口知道进程的 PID？
- https://ubuntuforums.org/archive/index.php/t-1124561.html
识别 1b
作为替代方案（可能更容易使用，但在你的情况下似乎不起作用），你可以打开终端并使用
$ wmctrl -l -p -x
列出当前窗口管理器管理的所有窗口（您可以使用wmctrl -m或检查它env | grep -i desktop，并且将该输出发布到 OP 中会很有用）。
从wmctrl --help：
The format of the window list:
<window ID> <desktop ID> <client machine> <window title>
这是基本格式，使用 获得-l。选项-p并-x添加额外列。输出的第 1 列（数字窗口 ID，来自基本选项-l）、第 3 列（PID 编号，来自选项-p）、第 4 列（WM_CLASS，来自选项-x）和第 5 列（窗口标题，来自基本选项-l）将最有用。
然后你可以使用
$ wmctrl -a <WIN>
对每个列出的窗口，选择“通过切换到其桌面并提升它来激活窗口”（选中）。这样，您就可以识别您的神秘窗口。
至于<WIN>：“此参数指定窗口。默认情况下，它被解释为字符串。该字符串与窗口标题匹配，并使用第一个匹配的窗口。匹配不区分大小写，字符串可能出现在标题的任何位置。”
<WIN>因此，对于上面第 5 列的任何子字符串，例如，使用 基本上没问题wmctrl -a 'Firefox'。您可能需要适当转义字符串。或者，您可以使用
$ wmctrl -a <window hex no.> -i
与上面的第 1 列（这避免了与窗口标题的字符串匹配可能产生的歧义），或者
$ wmctrl -a <WM_CLASS> -x
与上文第 4 列相同。
您可以尝试其他有趣且实用的选项，如-R或-G。
识别 2
对于pidno每个目标窗口，您可以使用
$ ps -ef | grep <pidno>
$ pwdx <pidno>
$ pidstat -p <pidno>
$ ls /proc/<pidno>
$ cat /proc/<pidno>/<file>
以进一步识别。您可以通过ls上文了解可以使用 的内容<file>，例如status或cmdline。
资料来源：