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Re: CM1150V Upstream Channel Problem with Xfinity

Scott_UU
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CM1150V Upstream Channel Problem with Xfinity

I purchased a CM1150V to replace an Xfinity (Arris) XB6.   The XB6 had been in place, running in bridge mode, for 2 months.  It showed (4) upstream channels with good power levels, (31+OFDM) downstream channels with all power levels between 0 and -2, SNR all between 38-39, and 0 correctables/uncorrectables.  Upload/download speeds exceeded my plan rating by 20%.

 

I disconnected the XB6, connected the CM1150V, and powered it up.  On the initial power up, it appeared to get a firmware update shortly after going online (alternating up/down leds, then reboot).  Firmware is reported as V2.02.03.  Activation through Xfinity's portal went smoothly, with both voice and data working.   As with the XB6, the downstream shows 31+OFDM, good power levels and SNR.

 

The only problem...   The CM1150V will only bond (2) upstream channels.  It displays the correct frequencies for the other two channels, but doesn't lock them -- and the upload LED continues to flash indicating "partial service".   Tried a couple power cycles, then a factory reset.  It still would only lock (2) of the (4) upstream channels.

 

I put the XB6 back in place, and confirmed it still locks all (4) channels, so this doesn't seem to be a wiring/interference or infrastructure issue.  I put the CM1150V back in place, and it still only locks (2) channels.

 

Here's what the XB6 reported for upstream channels:

XB6 Upstream Channels.jpg

And here is what the CM1150V reports:

CM1150V Upstream.jpg

Xfinity says the CM1150V is provisioned correctly, and should lock all (4) channels.  The XB6 locks all (4), so it doesn't seem to be a wiring, interference, or headend problem.

 

Any ideas?  Do I have a bad CM1150V?

 

 

 

Message 1 of 34

Accepted Solutions
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity

An Xfinity tech was out today.  He found a noise block filter at the pole.  No idea when or why it was installed.  That was blocking the two lower frequency channels.

 

A noise block filter had previously been ruled out, because the Xfinity-supplied Arris XB6 was reporting all (4) channels locked.  So I now question the veracity of the Arris XB6 status page.  All other modems tested (CM1150V, Arris TM722G, Arris SBV3202) were unable to lock the channels with that filter in place.   So I don't think the Arris XB6 was actually locking those channels either, even though it said it was.

 

Once the tech removed the noise block filter at the pole, the CM1150V immediately locked all (4) channels.  The constant T3/T4 errors are gone as well.  No problems with the CM1150V, the upstream issue was all from a previous Xfinity/Comcast tech installing that noise block filter at the tap.

 

Thanks to @vkdelta for help and supporting information, which helped me explain/prove the problem to Xfinity so they would come fix it!

 

View solution in original post

Message 7 of 34

All Replies
vkdelta
NETGEAR Expert

Re: CM1150V Upstream Channel Problem with Xfinity

1. There might have been an outage on comcast plant. Please reset to confirm if you have 2 or 4 US channels

2. Have you changed anything on your side? such as coax cable? or connector?

Message 2 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity


@vkdelta wrote:

1. There might have been an outage on comcast plant. Please reset to confirm if you have 2 or 4 US channels

2. Have you changed anything on your side? such as coax cable? or connector?


Hello @vkdelta ,

 

Thank you for responding.

 

1a.  I have restarted the CM1150V multiple times over a 48hr period.  Have also factory reset it.  The CM1150V only locks (2) US channels. 

 

1b.  Reconnecting the Arris XB6 to same connection, it locks all (4) US channels just as it did before.  Reconnecting the CM1150V to same connection, it is only locking (2) US channels.   

 

2a.  Drop, cable ends, moca filter, and single splitter have all been checked and swapped out.  All quality materials and parts as per Xfinity.  Again, the Arris XB6 locks all (4) US Channels on the same cable and connector.  The CM1150V is only locking (2) US channels on the same cable and connector.

 

2b.  All downstream signal levels are good, between 0 and -3 dBmV, with SNR between 38 and 39.   The two US channels that lock have upstream power between 40 and 42 dBmV.  These US and DS levels seem to indicate good cable and connections.

 

2c.  The Arris XB6 locks all (4) channels.  Disconnect it, connect CM1150V, and CM1150V only locks (2) channels.  Disconnect the CM1150V and reconnect XB6, it again locks (4) channels.    Can do this over-and-over, the problem is NOT intermittent.  The XB6 always gets (4) US channels, the CM1150V always gets (2).  It lists the proper frequency for the other (2), but does not lock.  This is on EXACT SAME COAX and CONNECTORS.

 

2d.  Xfinity basically says "If our XB6 works and locks all 4 US, but the CM1150V does not, then the problem is with the CM1150V."    I see their logic, but find it difficult to believe that a defect in a brand new CM1150V would only affect locking (2) US and nothing else.

Message 3 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity

@vkdelta 

 

Still having the same problem.  I procured a second CM1150V, and it behaves exactly the same way -- it only locks 2 US channels.  Yet I can connect the Arris XB6 and it locks 4 US channels.  This is in the same location, on same coax and connector.  The XB6 locks 4 US, but the CM1150V only locks 2 US.

 

The CM1150V units (both of them) also have a constant stream of T3/T4 timeouts, roughly every 30 seconds.  The Arris XB6 has an occassional T3/T4, perhaps a couple per day.  But the CM1150V continuously posts T3/T4 errors about every 30 seconds, they never stop. 

 

What would cause the CM1150V units (both of them) to only lock 2 US channels and get constant T3/T4 errors, while the Arris XB6 is able to lock 4 US and not get T3/T4 errors?

Message 4 of 34
vkdelta
NETGEAR Expert

Re: CM1150V Upstream Channel Problem with Xfinity

@Scott_UU 

thanks for good explanation.

 

Can you please PM me few details:

1. your Location 

2. your comcast account #

3. CM1150V CM MAC

4. XB6T CM MAC

5. Can you connect both them at same time using splitter ? If you have it. (of course internet will only work on one of them and but it will be useful for comcast folks to monitor it)

5. Are you willing to work with us to debug if this is CM or Comcast issue?   (Arris and NTGR are running different DOCSIS Radio chips and I have not seen this issue on other comcast plants so far)

6. Do you have another version of XB6 AKA Technicolor XB6T with you by any chance? 

 

 

thanks,VKdelta

 

Message 5 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity

@vkdelta

 

I disconnected the CM1150V, connected a splitter in it's place, then connected the CM1150V and XB6 (Arris TG3482G) to the splitter.  Both are connected to CMTS.  The CM1150V is activated (data and voice), the XB6 is not.

 

Signal levels are of course degraded a bit for both, because of the additional splitter, but are still within operating range.

 

I will PM you with additional details as requested.  Thanks for the assistance!

Message 6 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity

An Xfinity tech was out today.  He found a noise block filter at the pole.  No idea when or why it was installed.  That was blocking the two lower frequency channels.

 

A noise block filter had previously been ruled out, because the Xfinity-supplied Arris XB6 was reporting all (4) channels locked.  So I now question the veracity of the Arris XB6 status page.  All other modems tested (CM1150V, Arris TM722G, Arris SBV3202) were unable to lock the channels with that filter in place.   So I don't think the Arris XB6 was actually locking those channels either, even though it said it was.

 

Once the tech removed the noise block filter at the pole, the CM1150V immediately locked all (4) channels.  The constant T3/T4 errors are gone as well.  No problems with the CM1150V, the upstream issue was all from a previous Xfinity/Comcast tech installing that noise block filter at the tap.

 

Thanks to @vkdelta for help and supporting information, which helped me explain/prove the problem to Xfinity so they would come fix it!

 

Message 7 of 34
FunBucks
Aspirant

Re: CM1150V Upstream Channel Problem with Xfinity

Not sure if this is related to this post, or if I need to start a new one.

 

Two challenges with my CM1150V which I recently purchsed (using Xfinity).

 

The upstream light is always flashing green.  Never solid green like all other lights.

 

Also, my router is plugged into Ethernet Port 1.  Works.

 

When I plug anything else (ie PC) into ethernet ports 2,3,4 nothing happens.  I should just get direct hardwired internet to my PC? Correct?

 

So why do the other 3 ethernet ports not work.

 

Please advise.

Message 8 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity


@FunBucks wrote:

The upstream light is always flashing green.  Never solid green like all other lights.

I am curious about this as well.  When I was only getting 2 of the 4 upstream channels, the GUI said "(partial service)" above the channel list AND the upstream light was flashing to indicate "partial service".   Now that I'm getting all 4 upstream channels, the "(partial service)" text is gone from the GUI -- but the upstream light is still flashing.   Have rebooted and factory reset, but the LED is still flashing.  Hopefully someone from Netgear can answer that for both of us.

 


@FunBucks wrote:

Also, my router is plugged into Ethernet Port 1.  Works.  When I plug anything else (ie PC) into ethernet ports 2,3,4 nothing happens.  I should just get direct hardwired internet to my PC? Correct?  So why do the other 3 ethernet ports not work.

The CM1150V is a modem, not a gateway or router, so it has no routing capability.  You'll need to connect your router to the modem, and your other devices to the router.  The additional ethernet ports are for the "port aggregation" feature, which allows (if you have latest firmware, a plan with sufficient speed to need it, and a modem that supports it) a multi-gigabyte connection between the modem and the router. 

 

 

 

 

 

Message 9 of 34
vkdelta
NETGEAR Expert

Re: CM1150V Upstream Channel Problem with Xfinity

customer>>

The upstream light is always flashing green.  Never solid green like all other lights. -

 

response>>

This is because of partial service on upstream. if you fix the coax/line/plant issues and all 4 upstreams are locked. 

 

customer>>

Also, my router is plugged into Ethernet Port 1.  Works.

When I plug anything else (ie PC) into ethernet ports 2,3,4 nothing happens.  I should just get direct hardwired internet to my PC? Correct?

So why do the other 3 ethernet ports not work. 

 

response>>

Port 2,3,4 will only work if you have Multiple IP service package for different IPs. Some ISPs offer it, not all though.

Port 1,2 will work together if you enable LAG and have LAG-capable router.

 

Message 10 of 34
vkdelta
NETGEAR Expert

Re: CM1150V Upstream Channel Problem with Xfinity

response>>

This is because of partial service on upstream. if you fix the coax/line/plant issues and all 4 upstreams are locked then LED will be solid. 

Message 11 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity


@vkdelta wrote:

response>>

This is because of partial service on upstream. if you fix the coax/line/plant issues and all 4 upstreams are locked then LED will be solid. 


But my upstream problem IS fixed...  Channel status now shows all provisioned channels locked, and the "partial service" text is gone from the GUI.   BUT THE LIGHT IS STILL FLASHING.   Have tried power cycle and factory reset, US light still flashes.   ????

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 29 663000000 Hz -2.4 dBmV 38.8 dB 0 0
2 Locked QAM256 1 483000000 Hz -1.5 dBmV 39.8 dB 0 0
3 Locked QAM256 2 489000000 Hz -1.4 dBmV 39.8 dB 0 0
4 Locked QAM256 3 495000000 Hz -1.4 dBmV 39.8 dB 0 0
5 Locked QAM256 4 507000000 Hz -1.6 dBmV 39.7 dB 0 0
6 Locked QAM256 5 513000000 Hz -1.8 dBmV 39.7 dB 0 0
7 Locked QAM256 6 519000000 Hz -1.7 dBmV 39.8 dB 0 0
8 Locked QAM256 7 525000000 Hz -1.7 dBmV 39.8 dB 0 0
9 Locked QAM256 8 531000000 Hz -1.8 dBmV 39.7 dB 0 0
10 Locked QAM256 9 543000000 Hz -2 dBmV 39.6 dB 0 0
11 Locked QAM256 10 549000000 Hz -1.9 dBmV 39.6 dB 0 0
12 Locked QAM256 11 555000000 Hz -1.9 dBmV 39.5 dB 0 0
13 Locked QAM256 12 561000000 Hz -1.7 dBmV 39.6 dB 0 0
14 Locked QAM256 13 567000000 Hz -1.8 dBmV 39.6 dB 0 0
15 Locked QAM256 14 573000000 Hz -1.9 dBmV 39.6 dB 0 0
16 Locked QAM256 15 579000000 Hz -1.9 dBmV 39.5 dB 0 0
17 Locked QAM256 16 585000000 Hz -2 dBmV 39.5 dB 0 0
18 Locked QAM256 17 591000000 Hz -1.9 dBmV 39.5 dB 0 0
19 Locked QAM256 18 597000000 Hz -2 dBmV 39.4 dB 0 0
20 Locked QAM256 19 603000000 Hz -2.1 dBmV 39.3 dB 0 0
21 Locked QAM256 20 609000000 Hz -2.3 dBmV 39.3 dB 0 0
22 Locked QAM256 21 615000000 Hz -2.4 dBmV 39.2 dB 0 0
23 Locked QAM256 22 621000000 Hz -2.4 dBmV 39.1 dB 0 0
24 Locked QAM256 23 627000000 Hz -2.4 dBmV 39.1 dB 0 0
25 Locked QAM256 24 633000000 Hz -2.3 dBmV 39 dB 0 0
26 Locked QAM256 25 639000000 Hz -2.5 dBmV 38.9 dB 0 0
27 Locked QAM256 26 645000000 Hz -2.6 dBmV 38.8 dB 0 0
28 Locked QAM256 27 651000000 Hz -2.5 dBmV 38.7 dB 0 0
29 Locked QAM256 28 657000000 Hz -2.6 dBmV 38.8 dB 0 0
30 Locked QAM256 30 669000000 Hz -2.6 dBmV 38.7 dB 0 0
31 Locked QAM256 31 675000000 Hz -2.7 dBmV 37.9 dB 0 0
32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 5 5120 Ksym/sec 30100000 Hz 39.3 dBmV
2 Locked ATDMA 6 5120 Ksym/sec 36500000 Hz 39.8 dBmV
3 Locked ATDMA 7 5120 Ksym/sec 17300000 Hz 37.3 dBmV
4 Locked ATDMA 8 5120 Ksym/sec 23700000 Hz 38.3 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
 
Downstream OFDM Channels
Channel Lock 
Status
Modulation / 
Profile ID
Channel 
ID
Frequency Power SNR / 
MER
Active Subcarrier 
Number Range
Unerrored 
Codewords
Correctable 
Codewords
Uncorrectable 
Codewords
1 Locked 0 159 722000000 Hz -2.6 dBmV 38.0 dB 1126 ~ 2969 388467542 1 0
2 Not Locked 0 0 0 Hz 0 dBmV 0.0 dB 0 ~ 4095 0 0 0
 
Upstream OFDMA Channels
Channel Lock Status Modulation / Profile ID Channel ID Frequency Power
1 Not Locked 0 0 0 Hz 0 dBmV
2 Not Locked 0 0 0 Hz 0 dBmV

 

 

 

Message 12 of 34
ChallD
Aspirant

Re: CM1150V Upstream Channel Problem with Xfinity

I have the exact same problem.

Message 13 of 34
FURRYe38
Guru

Re: CM1150V Upstream Channel Problem with Xfinity

Contact the ISP and have them check the signal and channels for you. Possbile ask about a FW downgrade as well. The ISP should be able to fix this. 


@ChallD wrote:

I have the exact same problem.


 

Message 14 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity


@ChallD wrote:

I have the exact same problem.


Good luck getting it resolved. I opened tickets with both Comcast and Netgear.  Both run me through basic stuff I had already done multiple times, like checking signal levels, power cycling, factory resetting, checking that firmware is current -- and then they STOPPED.  Neither will assign an engineer to actually look at details and interaction between modem/cmts to investigate and determine where the issue is; they instead just point fingers at each other to avoid any responsibility or real investigative work. 

 

Comcast says everything is good at their end, all signal levels are great (both at modem and CMTS), correct firmware and provisioning file are in place, I'm getting provisioned speeds, and therefore it must be Netgear problem.  Netgear dodges the question of the modem reporting both "full service" (via GUI) and "partial service" (via LED) at the same time, and just keeps telling me to talk to Comcast -- but Comcast has done everything Netgear asked, and the problem remains.

 

The CM1150V is contradicting itself, showing full service in GUI but partial service via the flashing LED.  Both can't be right!  So at a minimum, Netgear needs to fix their firmware to consistently report status via the GUI and LED.  The ISP cannot do anything about that until Netgear gives them a new firmware to push out.  

Message 15 of 34
FURRYe38
Guru

Re: CM1150V Upstream Channel Problem with Xfinity

You might try another same model cablemodem to see if the problem continues. Could be bad HW as well. Try a CM1100 modem and see if it does the same thing. If it does, then both NG and CC need to address this. 

Message 16 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity


@FURRYe38 wrote:

You might try another same model cablemodem to see if the problem continues. Could be bad HW as well. Try a CM1100 modem and see if it does the same thing. 


Already tried a second CM1150V, and it behaves the same.  Also tried an Arris SBV3202 -- it does not indicate any service problems.  That implies a CM1150V firmware problem, erroneously flashing the LED when no problem exists, but I don't have enough data to conclusively prove that.  I'd use the Arris SBV3202, but it isn't Comcast-approved for future gigabit service which is why I went with the CM1150V -- but am keeping the SBV3202 as a backup / emergency spare.  The CM1100 doesn't support voice, so that doesn't fit my needs.  Having already purchased (3) modems and following extensive testing, logging, resets, etc. via tickets with both Netgear and Comcast, I feel like I've already gone further than any customer should have to go.

 


@FURRYe38 wrote:

If it does, then both NG and CC need to address this. 


I agree, both Netgear and Comcast should be working together to isolate and correct whatever the problem is.  Either the CM1150V is accurately detecting a partial service issue at Comcast and correctly flashing the Upstream LED (but failing to display that status in the GUI), *or* everything is just fine at Comcast and the CM1150V is erroneously flashing the LED.   

 

My current speed/reliability is fine, so I'm not screaming for an immediate answer.  Just want to know that someone is working on it, and that it will eventually be addressed.  Obviously something is wrong, with either the service or the status reporting, and it would be nice to know that someone cares about fixing that problem even if speed/reliability isn't impacted.

Model: CM1150V|DOCSIS 3.1 Nighthawk® Multi-Gig Speed Cable Modem for XFINITY® Voice
Message 17 of 34
FURRYe38
Guru

Re: CM1150V Upstream Channel Problem with Xfinity

Best way to let NG know is to file a support ticket. 

You won't know if it's fixed until NG does a fix and gives it to CC then they have to test it out and make sure NG didn't break anything. 

@DarrenM 

Good Luck. 

Message 18 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity


@FURRYe38 wrote:

Best way to let NG know is to file a support ticket. 

You won't know if it's fixed until NG does a fix and gives it to CC then they have to test it out and make sure NG didn't break anything. 

@DarrenM 

Good Luck. 


Not sure if you read my post -- as I mentioned earlier in this thread, I opened tickets with Comcast and Netgear.  Both ran me through all the "basic" troubleshooting (power cycle, check levels, check provisioning file, factory reset, yada yada yada) -- and then just appeared to lose all interest when those basic steps turned up nothing to explain the issue.  NG ticket #41178878; I never heard back after my last follow-up.

 

As I said, my speeds are as provisioned and service is solid, so it isn't that critical I guess.  Still, it's a $250 piece of equipment so I would eventually like a resolution.  Its sort of like a car with a temp gauge that says everything's fine, but the overtemp light is flashing.  Which is correct?  Having the dealer just tell me to "ignore the flashing light as long as its still running" would not satisfy me.  🙂

Message 19 of 34
FURRYe38
Guru

Re: CM1150V Upstream Channel Problem with Xfinity

You'll have to keep in contact with NG and CC. Hopefully something will get fixed. It won't be quick I presume.

If the modem is working accept for this one thing, then it may not be critical. If not, then return the modem and use something else and come back to this later on. 

 

Good Luck. 

 

Message 20 of 34
schillit
Aspirant

Re: CM1150V Upstream Channel Problem with Xfinity

I can't tell if my problem is the same or not.  Just activiated my cm1150v.  The problem I am having is that I have an ethernet cable run right from the modem to my computer (from port 2), and then an ethernet cable running to my router out of port 1 as instructed in the manual.  However, when I have them both plugged in at same time, only 1 works at a time; meaning only 1 can access the internet it seems.  So, If unplug my laptop, the router will start connecting to the internet.  If I unplug the router, the comptuer will start working.  Obvioulsy I have rebooted everything numerous times.  My previous Arris never had a problem once

Model: CM1150V|DOCSIS 3.1 Nighthawk® Multi-Gig Speed Cable Modem for XFINITY® Voice
Message 21 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity


@schillit wrote:

I can't tell if my problem is the same or not.  Just activiated my cm1150v.  The problem I am having is that I have an ethernet cable run right from the modem to my computer (from port 2), and then an ethernet cable running to my router out of port 1 as instructed in the manual.  However, when I have them both plugged in at same time, only 1 works at a time; meaning only 1 can access the internet it seems.  So, If unplug my laptop, the router will start connecting to the internet.  If I unplug the router, the comptuer will start working.  Obvioulsy I have rebooted everything numerous times.  My previous Arris never had a problem once


That's a different issue...  Xfinity residential service only supports one device (one MAC address) and a single IP at a time.  For activation and testing, connect a computer directly to port 1 of the CM1150V.  For normal operation, connect your router to port 1 of the modem.   The other 3 ports on the CM1150V are not for additional devices, but rather for using its port aggregation (with proper ISP support and a compatible router).

 

 

Message 22 of 34
schillit
Aspirant

Re: CM1150V Upstream Channel Problem with Xfinity

Thank you for the help, makes sense now.  i guess that's why there were black tabs in port 2,3,4 🙂

Message 23 of 34
brianiup
Guide

Re: CM1150V Upstream Channel Problem with Xfinity

I don't believe that is correct with this firmware... I have the same issue on 1.01 US locked 3 channels with no issues.. when it went up to 2.02 I had TONS of T-3 and T-4 errors and US would not lock more then 1 channel...

 

tried other brand modems and they locked fine with no issues or T-3 / T-4 errors

 

My signal on US and DS are fine comcast verified this, no noise on the line either...

 

Comcast reverted my CM1150V firmware back to 1.01 and it immediatly locked all upstream channels with no flashing lights (US and DS are solid green now)... This has to be a firmware issue as it only happens in version 2.02

 

Message 24 of 34
Scott_UU
Star

Re: CM1150V Upstream Channel Problem with Xfinity


@brianiup wrote:

I don't believe that is correct with this firmware... I have the same issue on 1.01 US locked 3 channels with no issues.. when it went up to 2.02 I had TONS of T-3 and T-4 errors and US would not lock more then 1 channel...

...

Comcast reverted my CM1150V firmware back to 1.01 and it immediatly locked all upstream channels with no flashing lights (US and DS are solid green now)... This has to be a firmware issue as it only happens in version 2.02

 


Odd, that's different (much worse) than what I'm seeing.

 

I have v2.02.03, am currently locking all provisioned channels US (4) and DS (31+OFDM), and have no errors in log.  The LED keeps flashing as if some channel weren't locked, but in the Netgear GUI everything shows locked (I suppose the GUI could be wrong and the light could be right, no way to tell for sure).

 

I got v2.02.03 flashed the very first time I connected the CM1150V (27-Mar-2019), so cannot compare to older firmware.  Initially I had problems locking US channels and tons of t3/t4 errors, but that was a problem at the tap.  When Comcast fixed that, the CM1150V (still with v2.02.03) immediately locked all provisioned channels and the t3/t4 errors stopped.

 

I suspect the flashing LED I'm seeing is a firmware error, and am inclined to believe the GUI (and Comcast) which both say everything is fine regarding signal lock.  Not sure about your problem -- sure does sound like it is related to the firmware upgrade though since it disappeared when you rolled back.

Message 25 of 34
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