["mmc_host mmc0: Bus speed" messages spamming syslog]

Hi,

 

reinstalled using https://dl.armbian.com/odroidxu4/Buster_legacy

 

running kernel

Linux odroidxu4 4.14.180-odroidxu4 #16 SMP PREEMPT Wed May 20 19:58:06 CEST 2020 armv7l GNU/Linux

still the same issue.

 

updated diagnosis

 

I think it has something to do with the empty emmc slot:

 

SD Card:

cat /sys/kernel/debug/mmc1/ios
clock:          200000000 Hz
actual clock:   200000000 Hz
vdd:            16 (2.8 ~ 2.9 V)
bus mode:       2 (push-pull)
chip select:    0 (don't care)
power mode:     2 (on)
bus width:      2 (4 bits)
timing spec:    6 (sd uhs SDR104)
signal voltage: 1 (1.80 V)
driver type:    0 (driver type B)

 

MMC slot:

clock:          0 Hz
vdd:            7 (1.65 - 1.95 V)
bus mode:       2 (push-pull)
chip select:    0 (don't care)
power mode:     1 (up)
bus width:      0 (1 bits)
timing spec:    0 (legacy)
signal voltage: 1 (1.80 V)
driver type:    0 (driver type B)

 

but it keeps bouncing between different values:

 

MMC Slot with a different reading:

clock:          100000 Hz
actual clock:   100000 Hz
vdd:            7 (1.65 - 1.95 V)
bus mode:       2 (push-pull)
chip select:    0 (don't care)
power mode:     2 (on)
bus width:      0 (1 bits)
timing spec:    0 (legacy)
signal voltage: 1 (1.80 V)
driver type:    0 (driver type B)

I tried to swap my 64 gig samsung "pro plus Class 10 U3" card for a more generic Sandisk 64 gig Class 10 UHS 1 card, also no difference..

 

 

 

["mmc_host mmc0: Bus speed" messages spamming syslog]

Hi Igor,

 

thank you for your blazing fast answer!

Unfortunately, I can only post once, every 24 hours?

 

I downgraded the kernel via

sudo apt-get install armbian-config

result:

Linux odroidxu4 4.14.150-odroidxu4 #2 SMP PREEMPT Mon Oct 28 08:07:45 CET 2019 armv7l GNU/Linux

 

This seemed to help for like one reboot, the messages are back now.

 

 

["mmc_host mmc0: Bus speed" messages spamming syslog]

Armbianmonitor:

http://ix.io/2mGZ

Hello everyone,

 

odroid xu4 user here with buster minimal 5.4 from https://dl.armbian.com/odroidxu4/Buster_current_minimal

please have a look at the following output

 

...
May 19 12:58:11 localhost kernel: [ 1581.893003] mmc_host mmc0: Bus speed (slot 0) = 50000000Hz (slot req 100000Hz, actual 100000HZ div = 250)
May 19 12:58:12 localhost kernel: [ 1582.352546] mmc_host mmc0: Bus speed (slot 0) = 50000000Hz (slot req 400000Hz, actual 396825HZ div = 63)
May 19 12:58:12 localhost kernel: [ 1582.389396] mmc_host mmc0: Bus speed (slot 0) = 50000000Hz (slot req 300000Hz, actual 297619HZ div = 84)
May 19 12:58:12 localhost kernel: [ 1582.426230] mmc_host mmc0: Bus speed (slot 0) = 50000000Hz (slot req 200000Hz, actual 200000HZ div = 125)
...

This messages repeat multiple times every second.

Board is running fine except the messages spamming my log