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2 Messages
Sudden extremely slow internet speeds (<5MBPS)
I have a speed plan of 100Mbps with Comcast. I am using the Motorola MG7540 modem, no additional router. I am only connecting one device (laptop) to check the internet speeds, and I have been getting consistently 5Mbps (using wifi) and 7Mbps (using ethernet connected to router) in my speed tests for two days now. I have contacted Comcast, but I was told that there was no issue with my connectivity and that I should check my modem.
So I restarted my modem, checked and reconnected my coax cable, but the problem was still persisting. I switched channels on my modem for both the 5G and 2.4G, but that did not help. I checked the log of my modem, and it appears that the numbers are fine:
Downstream:
| Channel | Lock Status | Modulation | Channel ID | Freq. (MHz) | Pwr (dBmV) | SNR (dB) | Corrected | Uncorrected |
| 1 | Locked | QAM256 | 26 | 649.8 | 0.6 | 40.5 | 0 | 0 |
| 2 | Locked | QAM256 | 27 | 655.8 | 1 | 40.7 | 0 | 0 |
| 3 | Locked | QAM256 | 28 | 661.8 | 0.5 | 40.5 | 0 | 0 |
| 4 | Locked | QAM256 | 29 | 667.8 | 0.9 | 40.7 | 0 | 0 |
| 5 | Locked | QAM256 | 30 | 673.8 | 0.8 | 39.7 | 0 | 0 |
| 6 | Locked | QAM256 | 31 | 679.8 | 0.7 | 40.6 | 0 | 0 |
| 7 | Locked | QAM256 | 32 | 685.8 | 0.9 | 40.6 | 0 | 0 |
| 8 | Locked | QAM256 | 33 | 691.8 | 1 | 40.7 | 0 | 0 |
| 9 | Locked | QAM256 | 34 | 697.8 | 0.8 | 40.5 | 0 | 0 |
| 10 | Locked | QAM256 | 35 | 703.8 | 1.2 | 40.6 | 0 | 0 |
| 11 | Locked | QAM256 | 36 | 709.8 | 1 | 40.5 | 0 | 0 |
| 12 | Locked | QAM256 | 37 | 715.8 | 1.1 | 40.4 | 0 | 0 |
| 13 | Locked | QAM256 | 38 | 721.8 | 0.9 | 40.4 | 0 | 0 |
| 14 | Locked | QAM256 | 39 | 727.8 | 0.7 | 40.3 | 0 | 0 |
| 15 | Locked | QAM256 | 40 | 733.8 | 0.7 | 40.3 | 0 | 0 |
| 16 | Locked | QAM256 | 41 | 739.8 | 0.7 | 40.2 | 0 | 0 |
| Total | 0 | 0 |
Upstream:
| Channel | Lock Status | Channel Type | Channel ID | Symb. Rate (Ksym/sec) | Freq. (MHz) | Pwr (dBmV) |
| 1 | Locked | ATDMA | 7 | 5120 | 30.1 | 50.5 |
| 2 | Locked | ATDMA | 5 | 5120 | 17.3 | 51.5 |
| 3 | Locked | ATDMA | 6 | 5120 | 23.7 | 50.8 |
| 4 | Locked | ATDMA | 8 | 5120 | 36.5 | 50.3 |
I am at a loss of what to do now. Comcast support has insisted that it is a problem with my modem and I should change it, but it is relatively new (I only used it for one year), and I can't seem to find a problem with it. I have much higher internet speed tests (~60Mbps to ~100Mbps) before this problem started, and now the slow speed has been persisting for the past two days.
Any ideas on how I should proceed with fixing this issue? Greatly appreciate your help!
ProfessorHonest
Regular Visitor
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7 Messages
4 years ago
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FasterNet20
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1 Message
4 years ago
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CheapestGamer
Contributor
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215 Messages
4 years ago
We're on an 'up to 200 Mbps' plan and usually in off peak times we were getting around 150-175Mbps down. The upload speed is still in the 4-5 Mbps range but at this point (4 am, 8/2/2020) we're at 28-33 Mbps download speed (down from 40-45 Mbps this past week). At this rate we'll be at the starter DSL "speed" of 768Kbps before long. So far NO response from anybody at the company in regards to what could be the issue, yet I'm sure they want their $154 and change for this "speed" and the TV channels we mostly don't watch on the 8th right like clockwork.
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Bushwhacker11
New Poster
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1 Message
4 years ago
Same issue I am having. The speedtest program shows less than 5 MB wireless and around 7 MB LAN. I used to get almost 200 MB. I looked at downgrading my service, why pay for what they can't provide and there isn't a way to go lower that I have found.
Anyone know how to pay for what you are actually getting?
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BruceW
Gold Problem Solver
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25.5K Messages
4 years ago
The upstream power levels are borderline/too high. Problems like this are often due to poor coax connections or damaged coax cable, usually in or near your home.
If you want to troubleshoot this yourself, please see Internet Troubleshooting Tips. If you can't find the problem or you'd rather have Comcast take care of it, call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. Insist they send a tech out to identify the cause and correct it.
If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit unless you have their Service Protection Plan (https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device, or anything outside your home, you shouldn't be charged.
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CheapestGamer
Contributor
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215 Messages
4 years ago
That was one of the first things I tried. I even left it unplugged for 30-40 MINUTES last night. No change.
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IAMIS11cc
New Poster
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4 Messages
4 years ago
I get the same thing. Sometimes powering off the modem works sometimes it doesn't. But it is happening at least a couple times a day. Who can we work from home with this?
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user_659b59
Visitor
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1 Message
3 years ago
I have the same issue. I reset my router and get a 220 mbps speed (300 mbps connection) for couple of days and then it goes back to 50-80 mbps speed. Some times it goes below 10 too.
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EG
Expert
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103.5K Messages
3 years ago
@user_659b59
Please create a new topic of your own here on this board detailing your issue. Thanks. 8 month old dead now being closed.
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