Dramatic reduction in performance after adding RTC

[frankpintosr]

Hi All, I recently added an RTC to my setup.  I used one of these HiLetgo DS3231 High Precision RTC.  Here are the steps I followed.

1. Image SD card with OpenAuto Pro 3.3
   
2. First boot and config with only Rii Keyboard USB dongle
   #Check and install updatessudo sh -c "apt-get update && apt-get dist-upgrade && apt-get autoremove"sudo shutdown
3. Physically connect USB sound card UGREEN USB Audio Adapter External Stereo Sound Card
   
4. Physically connect the GPS Module neo-6m-gy-gps6m
   
5. Boot Pi
   #Installs gpsd clientssudo apt-get -y install gpsd gpsd-clients python-gps#Disable the gpsd systemd servicesudo systemctl stop gpsd.socketsudo systemctl disable gpsd.socket#Now the gpsd needs to be started and pointed at the UARTsudo killall gpsdsudo gpsd /dev/ttyS0 -F /var/run/gpsd.sock#Disable the serial getty servicesudo systemctl stop serial-getty@ttyS0.servicesudo systemctl disable serial-getty@ttyS0.service#Enable UARTsudo nano /boot/config.txt #At the end of the file add enable_uart=1#Edit /boot/cmdline.txtsudo mv /boot/cmdline.txt /boot/cmdline.txt.origsudo nano /boot/cmdline.txt #Add the following line dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwaitsudo reboot now#Connect gpsd to UART and testsudo killall gpsdsudo gpsd /dev/ttyS0 -F /var/run/gpsd.sock# Start gpsd at bootsudo nano /etc/default/gpsd #Change options to look like this START_DAEMON="true" DEVICES="/dev/ttyS0" GPSD_OPTIONS="-n"sudo systemctl enable gpsd.socketsudo systemctl start gpsd.socketsudo reboot now#Testcgpssudo shutdown
6. Physically connect and install RTC HiLetgo DS3231 High Precision RTC
   RPI Pins          RTC PinsPin#1 3V3        Pin#1 +Pin#3 SDA       Pin#2 DPin#5 SCL        Pin#3 CPin#9 GND       Pin#5  -sudo mv /boot/config.txt /boot/config.txt.backupsudo nano /boot/config.txt #Add the following line dtoverlay=i2c-rtc,ds3231sudo mv /lib/udev/hwclock-set /lib/udev/hwclock-set.backup sudo nano /lib/udev/hwclock-set #If the following lines exist comment them out, if they do not exist, add them #if [ -e /run/systemd/system ] ; then # exit 0 #fi#Check the date and time of the RTCsudo hwclock -r#Write the system time to the RTCsudo hwclock -w#Set the system time from the RTCsudo hwclock -s#Disable the fake-hwclocksudo apt-get -y remove fake-hwclocksudo update-rc.d -f fake-hwclock removesudo systemctl disable fake-hwclocksudo reboot now
   

After this reboot the Pi operates VERY slowly and I am unsure how to troubleshoot this.  Can someone please help?

Thank you!
Frank

My Setup
2004 Chevrolet Tahoe Z71 with Bose and Onstar
Raspberry Pi 3 Module B+

[BlueWave]

Hello,
Your problem looks very similar to this one https://bluewavestudio.io/community/show...hp?tid=576.

Could you please check whether below lines are still in /boot/config.txt?

gpu_mem=256
dtoverlay=vc4-fkms-v3d

[frankpintosr]

Hello,
Your problem looks very similar to this one https://bluewavestudio.io/community/show...hp?tid=576.

Could you please check whether below lines are still in /boot/config.txt?

gpu_mem=256
dtoverlay=vc4-fkms-v3d

Strange, this file looks empty!  I currently have this in config.txt

  GNU nano 2.7.4               File: ./boot/config.txt                          
  GNU nano 2.7.4                File: /boot/config.txt                          
                                                                                
dtoverlay=i2c-rtc,ds3231                                                                                                               
dtparam=i2c_arm=off     

I have edited the file to

GNU nano 2.7.4                   File: config.txt                             
                                                                                
dtoverlay=i2c-rtc,ds3231                                                        
dtoverlay=vc4-fkms-v3d                                                          
dtparam=i2c_arm=off                                                             
                                                                                
gpu_mem=256   

Is this correct now?

[BlueWave]

Better try to add desired lines to default OpenAuto Pro /boot/config.txt file:

# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=off
#dtoverlay=vc4-kms-v3d
gpu_mem=256
dtoverlay=vc4-fkms-v3d
disable_splash=1

dtoverlay=i2c-rtc,ds3231                                                                                                              
dtparam=i2c_arm=off

[frankpintosr]

Better try to add desired lines to default OpenAuto Pro /boot/config.txt file:

# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details

# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi

# Additional overlays and parameters are documented /boot/overlays/README

# Enable audio (loads snd_bcm2835)
dtparam=audio=off
#dtoverlay=vc4-kms-v3d
gpu_mem=256
dtoverlay=vc4-fkms-v3d
disable_splash=1

dtoverlay=i2c-rtc,ds3231                                                                                                              
dtparam=i2c_arm=off

That was the issue!  Once I added the following lines to /boot/config.txt performance went back to normal.  

gpu_mem=256
dtoverlay=vc4-fkms-v3d

After that test I deleted my config.txt, renamed my config.txt.backup to config.txt, added the two lines above, saved and rebooted.  I also looked at my process to get the RTC working and found I renamed the original config.txt and then created a new file called config.txt  It was a simple as changing the command line as shown below.

sudo mv /boot/config.txt /boot/config.txt.backup
to
sudo cp /boot/config.txt /boot/config.txt.backup