Question Internet disconnected on system startup

Rickz6

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May 31, 2014
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I don't know if an update changed something, but lately my PC has no internet via Ethernet or Wifi until I reboot my modem/router, and the issue returns every time I reboot/wake. Every other device in my house works as normal, but for my PC I've had to reboot my modem daily. This began suddenly about 2 days ago.

I've researched it and tried to following steps:

-Attempted to disable "Allow the computer to turn off this device to save power" on Realtek Gaming GbE Family Controller. Power Management option is no longer available to me.

-Tried updating drivers on the above. Driver says up to date.

-Ran network troubleshooter.

-Disabled antivirus and Windows Firewall.

-Network Reset

-Flushed DNS via cmd admin

Nothing worked, network is still disconnected every morning when I wake my PC. Have to unplug modem and wait around like a goon before being able to access the internet.

Any help is appreciated, thanks.
 

kanewolf

Titan
Moderator
I don't know if an update changed something, but lately my PC has no internet via Ethernet or Wifi until I reboot my modem/router, and the issue returns every time I reboot/wake. Every other device in my house works as normal, but for my PC I've had to reboot my modem daily. This began suddenly about 2 days ago.

I've researched it and tried to following steps:

-Attempted to disable "Allow the computer to turn off this device to save power" on Realtek Gaming GbE Family Controller. Power Management option is no longer available to me.

-Tried updating drivers on the above. Driver says up to date.

-Ran network troubleshooter.

-Disabled antivirus and Windows Firewall.

-Network Reset

-Flushed DNS via cmd admin

Nothing worked, network is still disconnected every morning when I wake my PC. Have to unplug modem and wait around like a goon before being able to access the internet.

Any help is appreciated, thanks.
When it doesn't work, open a cmd.exe window Run the command "ipconfig.exe /all"
 

Rickz6

Distinguished
May 31, 2014
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18,510
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Do you have a 169.x.y.z address when it doesn't work?
Does it show "Media disconnected" ?
Does it show the correct gateway and DNS ?
It shows Media Disconnected for everything except my Ethernet connection, which looks like this:

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek Gaming GbE Family Controller
Physical Address. . . . . . . . . : A8-5E-45-E2-F0-C9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::15e1:a340:f584:a519%8(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.165.25(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 346578501
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-29-52-48-31-08-71-90-C0-19-DF
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled


When the internet comes bac, it looks like this:

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek Gaming GbE Family Controller
Physical Address. . . . . . . . . : A8-5E-45-E2-F0-C9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2601:2c7:4480:22e0::c35a(Preferred)
Lease Obtained. . . . . . . . . . : Wednesday, December 22, 2021 3:18:21 PM
Lease Expires . . . . . . . . . . : Wednesday, December 29, 2021 3:18:21 PM
IPv6 Address. . . . . . . . . . . : 2601:2c7:4480:22e0:15e1:a340:f584:a519(Preferred)
Temporary IPv6 Address. . . . . . : 2601:2c7:4480:22e0:dc7d:f9fe:9688:dcd2(Preferred)
Link-local IPv6 Address . . . . . : fe80::15e1:a340:f584:a519%8(Preferred)
IPv4 Address. . . . . . . . . . . : 10.0.0.190(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Wednesday, December 22, 2021 3:17:04 PM
Lease Expires . . . . . . . . . . : Friday, December 24, 2021 3:17:05 PM
Default Gateway . . . . . . . . . : fe80::a656:ccff:fed3:76d9%8
10.0.0.1
DHCP Server . . . . . . . . . . . : 10.0.0.1
DHCPv6 IAID . . . . . . . . . . . : 346578501
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-29-52-48-31-08-71-90-C0-19-DF
DNS Servers . . . . . . . . . . . : 2001:558:feed::1
2001:558:feed::2
10.0.0.1
2001:558:feed::1
2001:558:feed::2
NetBIOS over Tcpip. . . . . . . . : Enabled
 

kanewolf

Titan
Moderator
It shows Media Disconnected for everything except my Ethernet connection, which looks like this:

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek Gaming GbE Family Controller
Physical Address. . . . . . . . . : A8-5E-45-E2-F0-C9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::15e1:a340:f584:a519%8(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.165.25(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 346578501
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-29-52-48-31-08-71-90-C0-19-DF
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled


When the internet comes bac, it looks like this:

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek Gaming GbE Family Controller
Physical Address. . . . . . . . . : A8-5E-45-E2-F0-C9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2601:2c7:4480:22e0::c35a(Preferred)
Lease Obtained. . . . . . . . . . : Wednesday, December 22, 2021 3:18:21 PM
Lease Expires . . . . . . . . . . : Wednesday, December 29, 2021 3:18:21 PM
IPv6 Address. . . . . . . . . . . : 2601:2c7:4480:22e0:15e1:a340:f584:a519(Preferred)
Temporary IPv6 Address. . . . . . : 2601:2c7:4480:22e0:dc7d:f9fe:9688:dcd2(Preferred)
Link-local IPv6 Address . . . . . : fe80::15e1:a340:f584:a519%8(Preferred)
IPv4 Address. . . . . . . . . . . : 10.0.0.190(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Wednesday, December 22, 2021 3:17:04 PM
Lease Expires . . . . . . . . . . : Friday, December 24, 2021 3:17:05 PM
Default Gateway . . . . . . . . . : fe80::a656:ccff:fed3:76d9%8
10.0.0.1
DHCP Server . . . . . . . . . . . : 10.0.0.1
DHCPv6 IAID . . . . . . . . . . . : 346578501
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-29-52-48-31-08-71-90-C0-19-DF
DNS Servers . . . . . . . . . . . : 2001:558:feed::1
2001:558:feed::2
10.0.0.1
2001:558:feed::1
2001:558:feed::2
NetBIOS over Tcpip. . . . . . . . : Enabled
I would start by disabling IPv6 on the host. That will simplify debugging.
Your first set of data shows that DHCP is not responding in a timely manner. That is what the 169.254.x.y IP address is showing.
What router do you have ? Have you tried a new cable ? Does the cable go direct or do you have powerline or in-wall cabling or WIFI repeater that you have connected via ethernet ?
 

Rickz6

Distinguished
May 31, 2014
15
0
18,510
0
I would start by disabling IPv6 on the host. That will simplify debugging.
Your first set of data shows that DHCP is not responding in a timely manner. That is what the 169.254.x.y IP address is showing.
What router do you have ? Have you tried a new cable ? Does the cable go direct or do you have powerline or in-wall cabling or WIFI repeater that you have connected via ethernet ?
I have a rented modem/router from Comcast Xfinity, connected directly with a 100ft ethernet cable to my PC. have not tried a new cable since I don't have one that will unroll to the modem in the other room. But if the cable was damaged, wouldn't it not work all the time, instead of until I reboot the modem? I've called Comcast in the hopes it may be the modem, never had issues like this before.
 

kanewolf

Titan
Moderator
I have a rented modem/router from Comcast Xfinity, connected directly with a 100ft ethernet cable to my PC. have not tried a new cable since I don't have one that will unroll to the modem in the other room. But if the cable was damaged, wouldn't it not work all the time, instead of until I reboot the modem? I've called Comcast in the hopes it may be the modem, never had issues like this before.
I think you need to temporarily move the PC closer and use a different cable. Cable problems are the first thing to suspect.
Is your 100ft cable a flat cable?
 

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