我尝试使用我的三星 Galaxy S10e 通过 USB 线将我的笔记本电脑和 Xubuntu 22.04 连接到互联网。
我可以建立连接：
~$ sudo dmesg
[ 8666.252715] usb 1-4: new high-speed USB device number 8 using xhci_hcd
[ 8666.407548] usb 1-4: New USB device found, idVendor=04e8, idProduct=6860, bcdDevice= c.00
[ 8666.407558] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 8666.407562] usb 1-4: Product: SAMSUNG_Android
[ 8666.407564] usb 1-4: Manufacturer: SAMSUNG
[ 8666.407567] usb 1-4: SerialNumber: RF8R20KASDF
并获取 IP：
~$ ifconfig
usb0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.253.109 netmask 255.255.255.0 broadcast 192.168.253.255
inet6 fe80::5973:a630:b03a:cb2f prefixlen 64 scopeid 0x20<link>
ether ea:38:73:9a:5f:df txqueuelen 1000 (Ethernet)
RX packets 229 bytes 60459 (60.4 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 330 bytes 189389 (189.3 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
并 ping 一个互联网地址：
~$ ping tv2.dk
PING tv2.dk (199.232.42.217) 56(84) bytes of data.
64 bytes from 199.232.42.217 (199.232.42.217): icmp_seq=1 ttl=58 time=16.3 ms
64 bytes from 199.232.42.217 (199.232.42.217): icmp_seq=2 ttl=58 time=34.3 ms
但浏览功能无法正常使用。即使有，也只能加载一小部分页面。
以下是 wget 的一个示例：
~$ wget -O slet -d https://cdn.shortpixel.ai/spai/q_lossy+w_998+to_avif+ret_img/https://www.mindful.org/content/uploads/What-Happens-When-We-Reconnect-with-Nature.jpg
DEBUG output created by Wget 1.21.2 on linux-gnu.
Reading HSTS entries from /home/tj/.wget-hsts
URI encoding = ‘UTF-8’
--2022-06-03 22:46:46-- https://cdn.shortpixel.ai/spai/q_lossy+w_998+to_avif+ret_img/https://www.mindful.org/content/uploads/What-Happens-When-We-Reconnect-with-Nature.jpg
Løser cdn.shortpixel.ai (cdn.shortpixel.ai)... 194.242.11.186
Caching cdn.shortpixel.ai => 194.242.11.186
Tilslutter cdn.shortpixel.ai (cdn.shortpixel.ai)|194.242.11.186|:443... forbundet.
Created socket 4.
Releasing 0x00005616f3cfc970 (new refcount 1).
Initiating SSL handshake.
Handshake successful; connected socket 4 to SSL handle 0x00005616f3cfd650
certificate:
subject: CN=*.shortpixel.ai
issuer: CN=Sectigo RSA Domain Validation Secure Server CA,O=Sectigo Limited,L=Salford,ST=Greater Manchester,C=GB
X509 certificate successfully verified and matches host cdn.shortpixel.ai
---request begin---
GET /spai/q_lossy+w_998+to_avif+ret_img/https://www.mindful.org/content/uploads/What-Happens-When-We-Reconnect-with-Nature.jpg HTTP/1.1
Host: cdn.shortpixel.ai
User-Agent: Wget/1.21.2
Accept: */*
Accept-Encoding: identity
Connection: Keep-Alive
---request end---
HTTP forespørgsel sendt, afventer svar...
---response begin---
HTTP/1.1 200 OK
Date: Fri, 03 Jun 2022 20:46:46 GMT
Content-Type: image/avif
Content-Length: 92431
Connection: keep-alive
Server: BunnyCDN-NO1-830
CDN-PullZone: 257218
CDN-Uid: ceac3dab-9909-4315-8d54-a27751b54dd0
CDN-RequestCountryCode: DK
Access-Control-Allow-Origin: *
Access-Control-Allow-Headers: Server, x-goog-meta-frames, Content-Length, Content-Type, Range, X-Requested-With, If-Modified-Since, If-None-Match
Access-Control-Expose-Headers: Server, x-goog-meta-frames, Content-Length, Content-Type, Range, X-Requested-With, If-Modified-Since, If-None-Match
Cache-Control: max-age=30303404, s-maxage=604800
ETag: 4b11220eed5fe18fa2b5054aced4331d
Expires: Sat, 20 May 2023 04:45:30 GMT
Last-Modified: Fri, 20 May 2022 05:45:30 GMT
Pragma: cache
CDN-CachedAt: 06/03/2022 20:45:42
Link: <https://www.mindful.org/content/uploads/What-Happens-When-We-Reconnect-with-Nature.jpg>; rel="canonical"
CDN-Tag: 2299945; Domain: www.mindful.org; 200
XTag-SP-Debug: SLT: 0.012
CDN-ProxyVer: 1.02
CDN-RequestPullCode: 200
CDN-RequestPullSuccess: True
CDN-EdgeStorageId: 830
CDN-Status: 200
CDN-RequestId: 60f1fd865a714e93b083b4b328afbafb
CDN-Cache: HIT
---response end---
200 OK
Registered socket 4 for persistent reuse.
Længde: 92431 (90K) [image/avif]
Gemmer til: ‘slet’
slet 17%[==================> ... ] 16,00K --.-KB/s eta 1m 46s ^C
下载停止于 16KB。
我有一部旧款三星 Galaxy A3，在相同设置（相同的电脑、电缆、SIM 卡/运营商）下运行良好。
有什么建议吗？问题出在 Ubuntu 还是手机上？