我在我的机器上使用 Ubuntu Desktop 20.04 LTS，我更喜欢使用 Opera 作为我的网络浏览器。但是，我无法在 Webex 上观看我的讲座。它说
Your operating system or browser doesn't support the Webex Meetings app. Sign in on a Windows or Mac computer to download the app.
我还使用另一个允许 Opera 安装 Chrome 扩展的扩展将 Chrome 的 Webex 扩展安装到 Opera，但它不起作用。有人有解决方法吗？谢谢。
注意：Webex 可在 Firefox 和 Chrome 上运行。
如何让 Ubuntu 20.10 中的 Opera 支持 H.264？
如何安装 MPEG-4 AAC 解码器和 H.264 解码器？ 我尝试了以下但 Opera 上的 H.264 视频仍然无法播放：
$ sudo apt install libdvdnav4 libdvdread8 gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly libdvd-pkg ubuntu-restricted-extras
Reading package lists... Done
Building dependency tree
Reading state information... Done
gstreamer1.0-plugins-bad is already the newest version (1.18.0-2ubuntu6).
gstreamer1.0-plugins-ugly is already the newest version (1.18.0-1).
libdvdnav4 is already the newest version (6.1.0-1build1).
libdvdread8 is already the newest version (6.1.1-2).
libdvd-pkg is already the newest version (1.4.2-1-1).
ubuntu-restricted-extras is already the newest version (67).
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
我的 Lubuntu 运行良好，即使我打开 Opera，但过一会儿，可能是 30 分钟，可能会更早完全卡住，鼠标不动，有时我什至无法打开终端 Alt+Ctrl+F2 . 我没有看到任何逻辑，因为在那之后我重新启动计算机并且opera和libreoffice正常工作。此外，当计算机运行缓慢时，风扇开始努力工作，所以有些进程正在运行，但我无法捕捉到它。我关闭了自动更新。但没有任何帮助。Linux 有什么偏好可以避免这种情况？
免费-h：
total occupied free total buf./time. available
Memory 2,8Gi 1,7Gi 160Mi 198Mi 956Mi 718Mi
Swap: 0B 0B 0B
vm.swappiness=60
最佳：
op - 23:26:15 up 7:10, 1 user, load average: 0,75, 1,19, 1,39
Tasks: 193 total, 1 running, 192 sleeping, 0 stopped, 0 zombie
%Cpu(s): 22,6 us, 8,0 sy, 0,0 ni, 67,6 id, 1,7 wa, 0,0 hi, 0,0 si, 0,0 st
МиБ Mem : 2833,9 total, 152,5 free, 1721,7 used, 959,7 buff/cache
МиБ Swap: 0,0 total, 0,0 free, 0,0 used. 714,9 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
53780 hydronik 20 0 350188 90924 61388 S 32,9 3,1 22:14.48 code
53805 hydronik 20 0 900604 184116 44600 S 12,6 6,3 12:30.27 code
689 root 20 0 802932 98824 46576 S 10,3 3,4 8:27.60 Xorg
111501 hydronik 20 0 592112 56236 45176 S 3,0 1,9 0:02.11 qterminal
87267 hydronik 20 0 599424 57004 44500 S 2,7 2,0 0:44.77 qps
130268 hydronik 20 0 11924 3664 3144 R 0,7 0,1 0:00.12 top
387 root 20 0 8296 5040 1908 S 0,3 0,2 0:05.00 haveged
892 hydronik 20 0 267836 15692 11260 S 0,3 0,5 0:01.55 lxqt-session
991 hydronik 20 0 977844 75424 25072 S 0,3 2,6 0:18.73 lxqt-panel
1180 hydronik 20 0 283588 20292 13556 S 0,3 0,7 0:01.10 lxqt-powermanag
54130 hydronik 20 0 11,7g 151724 35180 S 0,3 5,2 3:25.64 code
81541 hydronik 20 0 675244 37900 26532 S 0,3 1,3 0:04.07 featherpad
111230 root 20 0 0 0 0 I 0,3 0,0 0:00.49 kworker/u4:8-phy0
111522 hydronik 20 0 536236 169896 120564 S 0,3 5,9 0:10.76 opera
1 root 20 0 167572 8320 5304 S 0,0 0,3 0:02.09 systemd
2 root 20 0 0 0 0 S 0,0 0,0 0:00.00 kthreadd
3 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 rcu_gp
4 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 rcu_par_gp
6 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 kworker/0:0H-kblockd
8 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 mm_percpu_wq
9 root 20 0 0 0 0 S 0,0 0,0 0:00.89 ksoftirqd/0
10 root 20 0 0 0 0 I 0,0 0,0 0:05.55 rcu_sched
11 root rt 0 0 0 0 S 0,0 0,0 0:00.20
migration/0
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a device;
this may
# be used with UUID= as a more robust way to name devices that works
even if
# disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump>
<pass>
UUID=b2d3ce06-03b1-4251-adbf-bd143dd8a213 / ext4 defaults 0 1
/swapfile none swap sw 0 0
我尝试安装 Chrome、Chromium、Brave、Opera，但几秒钟后它们都崩溃了。我不知道是什么原因造成的。唯一仍然适用于我的网络浏览器是 FireFox。任何帮助，将不胜感激。
系统信息：
$vmstat; lscpu
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 0 19329548 144508 9784220 0 0 57 198 128 400 3 1 96 0 0
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 12
On-line CPU(s) list: 0-11
Thread(s) per core: 2
Core(s) per socket: 6
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 158
Model name: Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
Stepping: 10
CPU MHz: 4112.579
CPU max MHz: 4600.0000
CPU min MHz: 800.0000
BogoMIPS: 6399.96
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 12288K
NUMA node0 CPU(s): 0-11
和
$uname -a
Linux P7xxTM1 5.3.0-26-generic #28~18.04.1-Ubuntu SMP Wed Dec 18 16:40:14 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
我这里的网络浏览器用完了哈哈
旁注：我使用终端/apt安装chrome/chromium浏览器，我从网站上下载了opera，而不是用软件商店安装而不是snap打开它。
编辑：
这是我从终端启动 Chrome 时终端中的输出。
$sensible-browser
[24166:1:0118/165230.672121:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[24166:1:0118/165230.672495:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[24166:1:0118/165230.738183:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[24166:1:0118/165230.738403:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[24166:1:0118/165230.738755:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[24166:1:0118/165230.739024:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
../../sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:(tg)kill() failure
Fontconfig error: Cannot load default config file
../../sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:(tg)kill() failure
--2020-01-18 16:52:49-- https://clients2.google.com/cr/report
Resolving clients2.google.com (clients2.google.com)... 172.217.0.14, 2607:f8b0:4009:813::200e
Connecting to clients2.google.com (clients2.google.com)|172.217.0.14|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/plain]
Saving to: ‘/dev/fd/4’
Crash dump id: 6783467315c400cc
0K
2.59M=0s
2020-01-18 16:52:50 (2.59 MB/s) - ‘/dev/fd/4’ saved [16]
[25221:7:0118/165250.548475:ERROR:command_buffer_proxy_impl.cc(124)] ContextResult::kTransientFailure: Failed to send GpuChannelMsg_CreateCommandBuffer.
[25221:1:0118/165250.868397:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25221:1:0118/165250.868820:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25221:1:0118/165250.869817:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25221:1:0118/165250.870163:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25221:1:0118/165250.870622:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25221:1:0118/165250.870915:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25221:1:0118/165250.871470:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25221:1:0118/165250.871735:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
../../sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:(tg)kill() failure
--2020-01-18 16:52:59-- https://clients2.google.com/cr/report
Resolving clients2.google.com (clients2.google.com)... 172.217.0.14, 2607:f8b0:4009:813::200e
Connecting to clients2.google.com (clients2.google.com)|172.217.0.14|:443... connected.
HTTP request sent, awaiting response... [25328:7:0118/165259.240123:ERROR:command_buffer_proxy_impl.cc(124)] ContextResult::kTransientFailure: Failed to send GpuChannelMsg_CreateCommandBuffer.
[25221:7:0118/165259.240777:ERROR:command_buffer_proxy_impl.cc(124)] ContextResult::kTransientFailure: Failed to send GpuChannelMsg_CreateCommandBuffer.
200 OK
Length: unspecified [text/plain]
Saving to: ‘/dev/fd/4’
0K
Crash dump id: c12b7c917021e48c
2.35M=0s
[25433:1:0118/165303.771155:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25433:1:0118/165303.771502:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25433:1:0118/165303.772068:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25433:1:0118/165303.772523:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25438:1:0118/165304.026215:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25438:1:0118/165304.027485:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25434:1:0118/165308.443739:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25434:1:0118/165308.444426:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
../../sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:(tg)kill() failure
--2020-01-18 16:53:10-- https://clients2.google.com/cr/report
Resolving clients2.google.com (clients2.google.com)... 172.217.0.14, 2607:f8b0:4009:813::200e
Connecting to clients2.google.com (clients2.google.com)|172.217.0.14|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/plain]
Saving to: ‘/dev/fd/4’
0K
Crash dump id: ebec1ff14e62c0d1
2.70M=0s
2020-01-18 16:53:10 (2.70 MB/s) - ‘/dev/fd/4’ saved [16]
../../sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:(tg)kill() failure
--2020-01-18 16:53:24-- https://clients2.google.com/cr/report
Resolving clients2.google.com (clients2.google.com)... 172.217.0.14, 2607:f8b0:4009:813::200e
Connecting to clients2.google.com (clients2.google.com)|172.217.0.14|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/plain]
Saving to: ‘/dev/fd/4’
0K
Crash dump id: 88d5a8d484ada05a
2.37M=0s
[25544:1:0118/165329.735896:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25544:1:0118/165329.736356:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25544:1:0118/165331.204150:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
[25544:1:0118/165331.204486:ERROR:child_process_sandbox_support_impl_linux.cc(79)] FontService unique font name matching request did not receive a response.
Fontconfig error: Cannot load default config file
../../sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:(tg)kill() failure
--2020-01-18 16:53:34-- https://clients2.google.com/cr/report
Resolving clients2.google.com (clients2.google.com)... 172.217.0.14, 2607:f8b0:4009:813::200e
Connecting to clients2.google.com (clients2.google.com)|172.217.0.14|:443... connected.
HTTP request sent, awaiting response... [26258:26258:0118/165334.467766:ERROR:gpu_channel_manager.cc(450)] ContextResult::kFatalFailure: Failed to create shared context for virtualization.
200 OK
Length: unspecified [text/plain]
Saving to: ‘/dev/fd/4’
0K
Crash dump id: 51ef3913492d0890
2.76M=0s
../../sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:(tg)kill() failure
--2020-01-18 16:53:44-- https://clients2.google.com/cr/report
Resolving clients2.google.com (clients2.google.com)... 172.217.0.14, 2607:f8b0:4009:813::200e
Connecting to clients2.google.com (clients2.google.com)|172.217.0.14|:443... connected.
HTTP request sent, awaiting response... [26344:26344:0118/165344.708145:ERROR:gpu_channel_manager.cc(450)] ContextResult::kFatalFailure: Failed to create shared context for virtualization.
200 OK
Length: unspecified [text/plain]
Saving to: ‘/dev/fd/4’
0KCrash dump id: 10e6e1b94c812a11
[24152:24159:0118/165349.344724:ERROR:ssl_client_socket_impl.cc(935)] handshake failed; returned -1, SSL error code 1, net_error -100
[24152:24159:0118/165349.354821:ERROR:ssl_client_socket_impl.cc(935)] handshake failed; returned -1, SSL error code 1, net_error -100
[24152:24159:0118/165349.500902:ERROR:ssl_client_socket_impl.cc(935)] handshake failed; returned -1, SSL error code 1, net_error -100
[24152:24159:0118/165420.719773:ERROR:ssl_client_socket_impl.cc(935)] handshake failed; returned -1, SSL error code 1, net_error -100
../../sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:(tg)kill() failure
--2020-01-18 16:54:20-- https://clients2.google.com/cr/report
Resolving clients2.google.com (clients2.google.com)... 172.217.0.14, 2607:f8b0:4009:813::200e
Connecting to clients2.google.com (clients2.google.com)|172.217.0.14|:443... connected.
HTTP request sent, awaiting response... [26470:26470:0118/165420.982513:ERROR:gpu_channel_manager.cc(450)] ContextResult::kFatalFailure: Failed to create shared context for virtualization.
200 OK
Length: unspecified [text/plain]
Saving to: ‘/dev/fd/4’
0K
Crash dump id: 370e7f42caa16b57
[25935:1:0118/165421.699794:ERROR:command_buffer_proxy_impl.cc(124)] ContextResult::kTransientFailure: Failed to send GpuChannelMsg_CreateCommandBuffer.
[24152:24159:0118/165433.404758:ERROR:ssl_client_socket_impl.cc(935)] handshake failed; returned -1, SSL error code 1, net_error -100
[24152:24159:0118/165433.405308:ERROR:ssl_client_socket_impl.cc(935)] handshake failed; returned -1, SSL error code 1, net_error -100
[24152:24159:0118/165433.407261:ERROR:ssl_client_socket_impl.cc(935)] handshake failed; returned -1, SSL error code 1, net_error -100
../../sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:(tg)kill() failure
--2020-01-18 16:54:48-- https://clients2.google.com/cr/report
Resolving clients2.google.com (clients2.google.com)... 172.217.0.14, 2607:f8b0:4009:813::200e
Connecting to clients2.google.com (clients2.google.com)|172.217.0.14|:443... connected.
[24112:24132:0118/165448.649960:FATAL:gpu_data_manager_impl_private.cc(990)] The display compositor is frequently crashing. Goodbye.
HTTP request sent, awaiting response... --2020-01-18 16:54:48-- https://clients2.google.com/cr/report
Resolving clients2.google.com (clients2.google.com)... 172.217.0.14, 2607:f8b0:4009:813::200e
Connecting to clients2.google.com (clients2.google.com)|172.217.0.14|:443... connected.
200 OK
Length: unspecified [text/plain]
Saving to: ‘/dev/fd/4’
0KCrash dump id: 4680739215b13a66
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/plain]
Saving to: ‘/dev/fd/4’
Crash dump id: 3c5b1d4ecc21b96a
0K --2020-01-18 16:54:49-- https://clients2.google.com/cr/report
Resolving clients2.google.com (clients2.google.com)... 172.217.0.14, 2607:f8b0:4009:813::200e
Connecting to clients2.google.com (clients2.google.com)|172.217.0.14|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/plain]
Saving to: ‘/dev/fd/4’
0KCrash dump id: 29048ddcc54988c9
Illegal instruction (core dumped)
我无法在 Opera 浏览器中观看 h.264 视频 mp4 格式。Ubuntu 版本 19.10。它在 19.04 工作。
我无法调整 Opera 浏览器窗口的大小！使用鼠标的手柄太小，所以我总是想念它们。此外，alt+space不会像往常那样弹出菜单。根据
forums.opera.com中的消息，解决方案应该是禁用绑定到 alt+space 的“即时搜索”。不幸的是，这也不起作用，所以我被卡住了。这是不幸的，因为在所有其他方面我发现 Opera 是最好的选择。（宏碁笔记本电脑，Ubuntu 19.04）
当我尝试在 Firefox 或 Opera 上浏览一些安全网站时，我经常收到错误“ERR_TLS13_DOWNGRADE_DETECTED”，而页面在 Chrome 上正常加载。
许多网站都会出现这种情况，但并非所有安全网站都会出现这种情况。
有没有办法让 Opera（或 Firefox）显示这些网站？
我在 18.04，使用 i3，有时当我从某个工作区转到包含铬或歌剧的工作区时，这些窗口不会重绘。我仍然可以按ctrl+s打开“保存到”弹出窗口，效果很好。
这种行为非常古怪，每天可能发生两次，我似乎无法找到可靠地重现它的方法。以下是一堆观察结果：
mpstat 2 1 | awk '$12 ~ /[0-9.]+/ { print 100 - $12"%" }'），当它发生时mod+q（从 i3 退出窗口）、ctrl+q（从 opera 中退出），但我似乎能够运行ctrl+w以退出选项卡，即使我没有立即看到它。当我重新打开歌剧时，该选项卡消失了fkill opera或适量的pkill opera我还没有设法隔离浏览器、i3 或其他包的条件和版本。据我所知，我正在运行最新的稳定版。
据我所知，可能是驱动程序错误，也可能是某个包中的错误。我什至不确定在哪里可以找到可能的日志
有什么建议么？这在别人身上发生过吗？我应该将此报告给歌剧/铬吗？我还应该为 i3 提交错误报告吗？我很困惑
我在带有 I3wm 的 Ubuntu 16.04 上使用 Opera 浏览器版本 56.0.3051.43，我得到了
您的浏览器目前无法识别任何可用的视频格式
当试图在 youtube 上播放一些关于HTML5的视频时。我看过几个关于这个的论坛，但只有非常过时的版本，没有一个是非常明确的步骤。我该如何解决这个问题？
由于 Opera (56.0) 发布了一个非常不错的新免费 VPN 功能，我想尝试使用它来观看基于与我自己不同的位置的 Netflix。
根据我收到的错误消息，Opera 似乎不支持 Linux 发行版上的 HTML5、Silverlight 4 或 Silverlight 5，并且过去使用的解决方法要么已被弃用（Pipelight），根本不起作用更长（Widevine）或要求您使用不同的浏览器或虚拟机。我已经看到一些关于切换用户代理的扩展的提及，但似乎没有一个足够合法以至于我敢于下载它。
这个问题有什么干净利落的解决方案吗？