Intermittent cable signal problems cause modem resets

I'm having intermittent cable signal problems which are logged in my cable modem's event log. It appears that the issue causes the modem to reset and things are normal for some number of hours then it happens again. This has been going on for a month or so. Xfinity said there were known issues in our area a week or so ago and the particular events logged changed a bit but overall the problem is largely unchanged.

The modem logs cycles like this:

13:11:56 Thu Feb 16 2023	Warning(5)	REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
13:11:57 Thu Feb 16 2023	Warning(5)	RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
13:11:57 Thu Feb 16 2023	Warning(5)	Dynamic Range Window violation
13:12:01 Thu Feb 16 2023	Warning(5)	TCS Partial Service;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;
19:00:31 Web Dec 31 1969	Critical(3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
19:00:41 Web Dec 31 1969	Notice(6)	Honoring MDD; IP provisioning mode = IPv6
17:18:05 Thu Feb 16 2023	Notice(6)	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;

My comms status shows:

Startup Sequence

Startup Step	Status	Comment
Acquire Downstream Channel	531000000 Hz	Locked
Upstream Connection	OK	Operational
Boot State	OK	Operational
Configuration File	OK
Security	Enabled	BPI+

Connection Status

System Up Time	0 days 2h: 1m: 7s
Network Access	Allowed

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Freq. (MHz)	Pwr (dBmV)	SNR (dB)	Corrected	Uncorrected
1	Locked	256 QAM	13	531.0	-5.4	40.6	0	0
2	Locked	256 QAM	1	459.0	-5.3	41.4	0	0
3	Locked	256 QAM	2	465.0	-5.2	41.5	0	0
4	Locked	256 QAM	3	471.0	-5.3	41.4	0	0
5	Locked	256 QAM	4	477.0	-5.3	41.2	0	0
6	Locked	256 QAM	5	483.0	-5.4	41.2	0	0
7	Locked	256 QAM	6	489.0	-5.3	41.2	0	0
8	Locked	256 QAM	7	495.0	-5.4	41.3	0	0
9	Locked	256 QAM	8	501.0	-5.6	38.9	0	0
10	Locked	256 QAM	9	507.0	-5.8	39.4	0	0
11	Locked	256 QAM	10	513.0	-5.7	40.4	0	0
12	Locked	256 QAM	11	519.0	-5.4	41.4	0	0
13	Locked	256 QAM	12	525.0	-5.4	41.4	0	0
14	Locked	256 QAM	14	537.0	-5.4	39.3	0	0
15	Locked	256 QAM	15	543.0	-5.3	40.4	0	0
16	Locked	256 QAM	16	549.0	-5.1	41.4	0	0
17	Locked	256 QAM	17	555.0	-5.2	41.4	0	0
18	Locked	256 QAM	18	561.0	-5.1	41.5	0	0
19	Locked	256 QAM	19	567.0	-5.2	41.4	0	0
20	Locked	256 QAM	20	573.0	-5.2	41.4	0	0
21	Locked	256 QAM	21	579.0	-5.3	40.2	0	0
22	Locked	256 QAM	22	585.0	-5.5	40.4	0	0
23	Locked	256 QAM	23	591.0	-5.4	40.8	0	0
24	Locked	256 QAM	24	597.0	-5.1	40.9	0	0
25	Locked	256 QAM	25	603.0	-4.9	41.7	0	0
26	Locked	256 QAM	26	609.0	-5.2	41.5	0	0
27	Locked	256 QAM	27	615.0	-5.2	41.4	0	0
28	Locked	256 QAM	28	621.0	-5.3	41.3	0	0
29	Locked	256 QAM	29	627.0	-5.5	41.3	0	0
30	Locked	256 QAM	30	633.0	-5.4	41.1	0	0
31	Locked	256 QAM	31	639.0	-5.5	38.5	0	0
32	Locked	256 QAM	32	645.0	-5.6	40.4	0	0
33	Locked	OFDM	159	702.0	-4.0	41.6	18885072	0

Upstream Bonded Channels

Channel	Lock Status	Channel Type	Channel ID	Symb. Rate (Ksym/sec)	Freq. (MHz)	Pwr (dBmV)
1	Locked	SC-QAM	2	5120	16.4	50.5
2	Locked	SC-QAM	3	5120	22.8	50.5
3	Locked	SC-QAM	4	5120	29.2	51.5
4	Locked	SC-QAM	5	5120	35.6	52.0
5	Locked	SC-QAM	6	2560	40.4	52.0

Any thoughts on this? I tried replacing the splitter at entry and it got (much) worse.

Thank you.

Your Home Network

user_sh217a

Intermittent cable signal problems cause modem resets

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