编辑：这些问题似乎主要发生在我尝试下载某些东西时，任何东西，并且对于大文件来说效果最为明显。有时，随后会出现多次长时间且令人痛苦的系统冻结。我非常生气，有人可以帮我解决这个问题吗？
我对Linux的复杂性不是很了解，但我在我的旧笔记本电脑（Thinkpad T420）上使用了elementary OS，没有出现任何重大问题。现在我得到了一个新的，它有一些我以前没有遇到过的问题： - 在正常使用期间（即冲浪或文本编辑器），它有相对频繁的冻结，即使内存和 CPU 似乎不在任何地方接近极限。 - 互联网连接经常中断，尽管在我的另一台机器上一切正常。不过wifi驱动似乎已经安装了。
我知道这是一个相当广泛的问题，但我真的不知道从哪里开始。这可能是 BIOS 问题吗？
编辑：
cat /proc/release产生“没有这样的文件或目录”。
cat /etc/os-release产量
NAME="elementary OS"
VERSION="5.1.3 Hera"
ID=elementary
ID_LIKE=ubuntu
PRETTY_NAME="elementary OS 5.1.3 Hera"
LOGO=distributor-logo
VERSION_ID="5.1.3"
HOME_URL="https://elementary.io/"
SUPPORT_URL="https://elementary.io/support"
BUG_REPORT_URL="https://github.com/elementary/os/issues/new"
PRIVACY_POLICY_URL="https://elementary.io/privacy-policy"
VERSION_CODENAME=hera
UBUNTU_CODENAME=bionic
和cat /proc/version产量
Linux version 5.3.0-46-generic (buildd@lcy01-amd64-013) (gcc version
7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)) #38~18.04.1-Ubuntu SMP Tue Mar 31
04:17:56 UTC 2020
编辑：我刚刚又遇到了无线网络问题之一。已连接到路由器，但没有互联网（虽然我在另一台设备上确实有互联网）。过了一会儿，我把无线网络关闭再打开，不久之后，它又恢复工作了。这是输出tail /var/log/syslog：
Apr 28 20:30:01 ge0rg-ThinkPad-L490 colord[844]: failed to get session
[pid 816]: No data available
Apr 28 20:30:01 ge0rg-ThinkPad-L490 acvpnagent[823]: Function:
logProbeFailure File: ../../vpn/Agent/NetEnvironment.cpp Line: 1524
The HTTP probe to 128.139.30.66 resulted in a redirect.
Apr 28 20:30:01 ge0rg-ThinkPad-L490 acvpnagent[823]: Function:
analyzeHttpResponse File: ../../vpn/Agent/NetEnvironment.cpp Line:
1840 SG (128.139.30.66) contacted
Apr 28 20:30:01 ge0rg-ThinkPad-L490 acvpnagent[823]: Current network
state: Secure Gateway accessible
Apr 28 20:30:03 ge0rg-ThinkPad-L490 nm-dispatcher: req:6
'connectivity-change': new request (2 scripts)
Apr 28 20:30:03 ge0rg-ThinkPad-L490 nm-dispatcher: req:6
'connectivity-change': start running ordered scripts...
Apr 28 20:30:05 ge0rg-ThinkPad-L490 systemd-resolved[696]: Using
degraded feature set (UDP) for DNS server 192.168.0.1.
Apr 28 20:30:10 ge0rg-ThinkPad-L490 plank.desktop[1559]:
[1722:1740:0428/203010.396690:ERROR:connection_factory_impl.cc(420)]
Failed to connect to MCS endpoint with error -105
Apr 28 20:30:20 ge0rg-ThinkPad-L490 systemd-resolved[696]: Using
degraded feature set (UDP) for DNS server
2a02:8109:9c80:3ee8:10:18ff:fec6:6f0c.
Apr 28 20:30:28 ge0rg-ThinkPad-L490 systemd-resolved[696]: Using
degraded feature set (TCP) for DNS server
2a02:8109:9c80:3ee8:10:18ff:fec6:6f0c.
此后，又发生了这样的事。这两次都是在我尝试做某事时发生的git clone，如果这有帮助的话。过去，当我尝试下载某些文件时，也经常会发生这些断开连接。这是最近 wifi 故障后的输出：
Apr 28 20:36:04 ge0rg-ThinkPad-L490 acvpnagent[823]: Function:
logProbeFailure File: ../../vpn/Agent/NetEnvironment.cpp Line: 1524
The HTTP probe to 128.139.30.66 resulted in a redirect.
Apr 28 20:36:04 ge0rg-ThinkPad-L490 acvpnagent[823]: Function:
analyzeHttpResponse File: ../../vpn/Agent/NetEnvironment.cpp Line:
1840 SG (128.139.30.66) contacted
Apr 28 20:36:04 ge0rg-ThinkPad-L490 acvpnagent[823]: Current network
state: Secure Gateway accessible
Apr 28 20:36:06 ge0rg-ThinkPad-L490 systemd-resolved[696]: Using
degraded feature set (TCP) for DNS server
2a02:8109:9c80:3ee8:10:18ff:fec6:6f0c.
Apr 28 20:36:07 ge0rg-ThinkPad-L490 NetworkManager[750]: <info>
[1588098967.5734] manager: NetworkManager state is now
CONNECTED_GLOBAL
Apr 28 20:36:07 ge0rg-ThinkPad-L490 nm-dispatcher: req:6
'connectivity-change': new request (2 scripts)
Apr 28 20:36:07 ge0rg-ThinkPad-L490 nm-dispatcher: req:6
'connectivity-change': start running ordered scripts...
Apr 28 20:36:07 ge0rg-ThinkPad-L490 nm-applet[1612]:
gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Apr 28 20:36:07 ge0rg-ThinkPad-L490 nm-applet[1612]:
gtk_widget_destroy: assertion 'GTK_IS_WIDGET (widget)' failed
Apr 28 20:36:07 ge0rg-ThinkPad-L490 nm-applet[1612]: Can't set a
parent on widget which has a parent
编辑：这是最新的日志。同样，在 期间git clone，这似乎相当一致地发生。与其他两个相反，我在重新连接之前运行了命令（我不知道这是否相关）：
Apr 28 20:40:55 ge0rg-ThinkPad-L490 kernel: [ 5076.816348] iwlwifi
0000:05:00.0: 0x0000485B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
Apr 28 20:40:55 ge0rg-ThinkPad-L490 kernel: [ 5076.816452] iwlwifi 0000:05:00.0: 0x0BADCAFE | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
Apr 28 20:40:55 ge0rg-ThinkPad-L490 kernel: [ 5076.816504] iwlwifi 0000:05:00.0: Collecting data: trigger 2 fired.
Apr 28 20:40:55 ge0rg-ThinkPad-L490 kernel: [ 5076.816513] ieee80211 phy0: Hardware restart was requested
Apr 28 20:40:55 ge0rg-ThinkPad-L490 systemd-resolved[696]: Using degraded feature set (UDP) for DNS server 192.168.0.1.
Apr 28 20:40:56 ge0rg-ThinkPad-L490 kernel: [ 5077.612625] iwlwifi 0000:05:00.0: Applying debug destination EXTERNAL_DRAM
Apr 28 20:40:56 ge0rg-ThinkPad-L490 kernel: [ 5077.728736] iwlwifi 0000:05:00.0: Applying debug destination EXTERNAL_DRAM
Apr 28 20:40:56 ge0rg-ThinkPad-L490 kernel: [ 5077.805262] iwlwifi 0000:05:00.0: FW already configured (0) - re-configuring
Apr 28 20:40:56 ge0rg-ThinkPad-L490 wpa_supplicant[754]: wlp5s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-48 noise=9999 txrate=144400
Apr 28 20:41:04 ge0rg-ThinkPad-L490 io.elementary.t[7031]: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkNotebook