Raspberry pi: model B+ only 229MB ram available

asms · 23. Februar 2015

hi,
i recently noticed that some of my ram disappeared. :-0. now htop and the graph is only showing 299 MB or ram. i don't remember doing any drastic changes other than just updates. system seems to be stable but just noticed the ram missing in the graph.
please see the screenshot which shows it one had around 500MB ram but now it only has 299 MB.
thanks
asms

davidh2k · 23. Februar 2015

Could be that the ram split was reset on an update. Check /boot/config.txt for that.

Greetings
David

asms · 23. Februar 2015

thanks David for the reply. the gpu-mem seems to be fine. it is 16 as i first set.

here is my config.

Code

root@omv:~# cat /boot/config.txt
# 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=1000


# for more options see http://elinux.org/RPi_config.txt
core_freq=500
sdram_freq=600
over_voltage=6
gpu_mem=16

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davidh2k · 23. Februar 2015

I don't have a B+ myself, please give @ryecoaaron some time to have a look at it.

Greetings
David

ryecoaaron · 23. Februar 2015

I read about a kernel config issue that caused 100+ mb to be unavailable on the RPi2 but I haven't read about this. I would guess the RPi forum might be more helpful.

asms · 25. Februar 2015

i tried updating the \boot firmware manually from https://github.com/raspberrypi/firmware. this seems to fix the memory issue. from ssh i can see total memory as 483.
root@omv:~# free -m
total used free shared buffers cached
Mem: 483 133 349 0 17 68
-/+ buffers/cache: 47 435
Swap: 999 0 999

but updating the firmware seems to break my web ui. nginx does not seem to be running.
root@omv:~# service nginx status
nginx is not running ... failed!

i tried restarting nginx but it gives me this

Code

root@omv:~# service nginx restart
Restarting nginx: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: [emerg] socket() [::]:80 failed (97: Address family not supported by protocol)
nginx: configuration file /etc/nginx/nginx.conf test failed
root@omv:~#

any ideas? thanks for your awesome support.

ryecoaaron · 25. Februar 2015

Did you run rpi-update?

asms · 25. Februar 2015

thanks @'ryecoaaron. that fixed it. just wondering how did rpi-update fix it? is it re downloading the firmware? i thought i did that manually.

ryecoaaron · 25. Februar 2015

Hard to say. I'm guessing you missed something. I always use rpi-update.

asms · 26. Februar 2015

thanks @ryecoaaron.

Jetzt mitmachen!