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Nighthawk CM2050V Comcast Firmware Killed Speed
I understand Comcast has just updated the firmware in these routers from V2.01.03 to V9.01.01. My download speed went from 934 to 225. Comcast tech came out yesterday and cleared some signal loss b...
I contacted a supervisor who actually responded he could see the modem was not properly provisioned, he opened another ticket and one of their best techs came out. I think they fixed it from inside but he was excellent. Problem solved after a month and about 15 tickets opened. Thanks for the encouragement
The laptops are perfect. If there's any corruption I reimage quickly. Yes Microsoft is adept at stuff being corrupted. I just fixed my neighbors laptop with corrupted wifi firmware.
The biggest tell is the gigabit light on the CM2050V flickering when it is getting gigabit speed. That light flickered for 2 months and I constantly measured the speed at 934 to the laptop on my LAN ethernet so it was getting over 1 Gbps. It has been solid for 5 weeks...that's the first thing I noticed and knew something was wrong. The new one I installed yesterday was trying to process the speed (light was flickering for a time) but could not and settled at solid. That was interesting and I was hopeful for a short time.
I just found out yesterday Comcast is rewiring the entire plant to mount the cable on the new PGE poles all new plant redone a few years ago for fire danger. Most of Comcast and ATT are on the old poles or hanging in space because they did not reach. Maybe that will change something....maybe not. I'm at the end of the line for Comcast...most of the development I live in does not have coax or telephony and they're not getting it. They have Hughes Net, Starlink or just a cell phone.
The DOCSIS 3.1 specification applies only to modems, not to routers.
Good luck.
One last try since we asked about this before, Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-routerAttach the cable diagnostic text file. The details would be much more helpful. See attached.
Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem. ISP are responsible for the signal up to the modem!
https://highspeed.tips/docsis-events/
db3058 wrote:
Not easy with copy and paste...site won't accept it unless I save from notepad txt to pdf and then copy and paste from there...took me a while
Try to get the .txt file from the diagnosic button, then convert to PDF to attach it.
The ISP specifically Comcast does not give a **bleep** about or want to see what the modem diagnostics are. They will troubleshoot their end with their cable analyzer, repair issues it reveals (in my case changing all the connectors) and they leave.
Here you go..thank you
Ok, so Correctables and Uncorrecables look ok but the power is fluxuation all over the place across all channels. Each channel needs to be with in 3db of each other. You have some channels that are just too high to some down around zero.
Heres what mine looks like for power across channels:
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectabables
1 Locked 256 QAM 31 837000000 Hz -1.9 dBmV 36.5 dB 0 0
2 Locked 256 QAM 1 651000000 Hz -1.1 dBmV 35.8 dB 0 0
3 Locked 256 QAM 2 657000000 Hz 0.9 dBmV 35.9 dB 0 0
4 Locked 256 QAM 3 663000000 Hz 0.3 dBmV 36.2 dB 0 0
5 Locked 256 QAM 4 669000000 Hz 0.2 dBmV 36.2 dB 0 0
6 Locked 256 QAM 5 675000000 Hz 0.1 dBmV 36.2 dB 0 0
7 Locked 256 QAM 6 681000000 Hz 0.1 dBmV 36.5 dB 0 0
8 Locked 256 QAM 7 687000000 Hz 0.1 dBmV 36.4 dB 0 0
9 Locked 256 QAM 8 693000000 Hz 0.3 dBmV 36.4 dB 0 0
10 Locked 256 QAM 9 699000000 Hz 0.3 dBmV 36.4 dB 0 0
11 Locked 256 QAM 10 705000000 Hz 0.2 dBmV 36.3 dB 0 0
12 Locked 256 QAM 11 711000000 Hz 0.3 dBmV 36.2 dB 0 0
13 Locked 256 QAM 12 717000000 Hz 0.9 dBmV 36.5 dB 0 0
14 Locked 256 QAM 13 723000000 Hz 0.8 dBmV 36.2 dB 0 0
15 Locked 256 QAM 14 729000000 Hz 0.9 dBmV 36.2 dB 0 0
16 Locked 256 QAM 15 735000000 Hz 1.1 dBmV 36.4 dB 0 0
17 Locked 256 QAM 16 741000000 Hz 1.1 dBmV 36.4 dB 0 0
18 Locked 256 QAM 17 753000000 Hz 1.0 dBmV 36.5 dB 0 0
19 Locked 256 QAM 18 759000000 Hz 0.9 dBmV 36.5 dB 0 0
20 Locked 256 QAM 19 765000000 Hz 0.7 dBmV 36.5 dB 0 0
21 Locked 256 QAM 20 771000000 Hz 0.6 dBmV 36.7 dB 0 0
22 Locked 256 QAM 21 777000000 Hz 0.1 dBmV 36.7 dB 0 0
23 Locked 256 QAM 22 783000000 Hz 0.0 dBmV 36.7 dB 0 0
24 Locked 256 QAM 23 789000000 Hz 0.0 dBmV 36.9 dB 0 0
25 Locked 256 QAM 24 795000000 Hz 0.3 dBmV 36.8 dB 0 0
26 Locked 256 QAM 25 801000000 Hz 0.6 dBmV 36.6 dB 0 0
27 Locked 256 QAM 26 807000000 Hz 0.6 dBmV 36.8 dB 0 0
28 Locked 256 QAM 27 813000000 Hz 0.5 dBmV 36.8 dB 0 0
29 Locked 256 QAM 28 819000000 Hz 0.9 dBmV 36.5 dB 0 0
30 Locked 256 QAM 29 825000000 Hz -1.1 dBmV 36.7 dB 0 0
31 Locked 256 QAM 30 831000000 Hz -1.5 dBmV 36.6 dB 0 0
32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0You need to get a on-site tech out and have them take a dive in to there signal up to your modem. They need to review Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.
Good Luck.
I've called Comcast and opened about 10 tickets. I know their plant is the issue. When I open a ticket about the cable plant they do nothing and close it remotely without ever talking to me. I opened 5 of those. When I call to complain about them closing those tickets without doing anything, they open another one and then close that a few hours later. If I do get a chance to talk to the 2nd level of support they speak such poor English there is no real understanding between us. I don't know who to call or where to go with this horrible company. I need a cable maintenance technician and they will not send one. I will try again with supervisors but I'm not hopeful anything will get resolved. They truly suck.
db3058 wrote:I've called Comcast and opened about 10 tickets. I know their plant is the issue. When I open a ticket about the cable plant they do nothing and close it remotely without ever talking to me. I opened 5 of those. When I call to complain about them closing those tickets without doing anything, they open another one and then close that a few hours later. If I do get a chance to talk to the 2nd level of support they speak such poor English there is no real understanding between us. I don't know who to call or where to go with this horrible company. I need a cable maintenance technician and they will not send one. I will try again with supervisors but I'm not hopeful anything will get resolved. They truly suck.
You might try a post on the Xfinity subforum here:
https://www.reddit.com/r/Comcast_Xfinity/wiki/knowledgebase/next-generation-internet/
Review some of the posts. In order to post, you have to join. The responders are mostly Comcast employees.
I contacted a supervisor who actually responded he could see the modem was not properly provisioned, he opened another ticket and one of their best techs came out. I think they fixed it from inside but he was excellent. Problem solved after a month and about 15 tickets opened. Thanks for the encouragement
Glad someone finally figured it out on there side. Please mark your thread as solved so others will know.
Enjoy.
db3058 wrote:I contacted a supervisor who actually responded he could see the modem was not properly provisioned, he opened another ticket and one of their best techs came out. I think they fixed it from inside but he was excellent. Problem solved after a month and about 15 tickets opened. Thanks for the encouragement
One step at a time. Happy the Reddit lead resulted in some progress. Persistence paid off!
I wonder if the same issue existed on your original modem?
