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gnuton / asuswrt-merlin.ng

Extends the support of Merlin firmware to more ASUS routers
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DSL-AX82U 0.0 dB problem. #564

Open efsanesro opened 3 months ago

efsanesro commented 3 months ago

**Modem = DSL-AX82U Current Version : 3004.388.6_2-gnuton0_beta1

Is this bug present in upstream Merlin releases too? Yes

I get less upload speed because of the fact that it says 0.0 DB. could you please help me.**

2. there is a -6 dB setting in the picture, I wonder if there is a chance to add this setting up to -20.

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Katana1074 commented 3 months ago

Hi there bug confirmed....

However I see none of the slowdown of upload speed, possibly because I only run -1 SNR

Screenshot 2024-03-31 100931

fards commented 3 months ago

it is showing the same in 386_0 but there's no loss of speed here. So I'm not sure it's much of the reason?

image

fards commented 3 months ago

Just realised - I'd had SNR at +4 while experimenting.

here's snr margin disabled - it does show 0.db but I don't think it's affecting anything.

image

gnuton commented 3 months ago

the attenuation value is fetched from void get_xdsl_info(XDSL_INFO *info); the funciton is defined in dsl-broadcom.o. To fix this I may need to revert back this to an older versoin, but this doesn't sound good.

The DSL-AX82U comes with two DSL firwares. Setting SNR is not supported anymore in the latest firmware, since it's considered legacy non standard by vendors (broadcom). If you set SNR on then you will use old dSL firmwares. The modem doesn't run merlin but it rather runs one of these two firmwres. As for now this attenuation missing value seems to be an issue from the dsl-broadcom.o For this reason I would not be worried about this. The actual attenuation values are written

gnuton commented 3 months ago

I will leave this issue as problem. ATM I do not have fix or it.