Where is my 800MB of RAM gone? Ubuntu is not detecting all my memory

hr flag

I am a bit confused about my 800mb out of 2gb ram gone ? I already test the following command,

 sudo dmidecode | grep Size | grep MB

Size: 2048 Mar

free -h
Type total used free shared buff/cache available
Mem 1.2Gi 564ML 87Mi 115Mi 563Mi 387Mi
Swap 2.0Gi 118Mi 1.9Gi
cat /proc/meminfo | grep Slab

Stab: 114756 kB

dmesg | grep stolen

25.169226] pci 0000:00:00.0: detected 32768K stolen memory

sudo dmesg | grep -i 'Memory:'
[0.000000] PM: hibernation: Registered nosave memory

[mem 0x00000000-0x00000fff]

0.000000] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x0009ffff]

[ 0.000000] PM: hibernation: Registered nosave memory: [mem 0x000a0000-0x000eefff] [ 0.000000] PM: hibernation: Registered nosave memory: [mem 0x000ef000-0x000fffff]

[ 0.000000] PM: hibernation: Registered nosave memory: [mem 0x4ff4a000-0x76685fff]

[ 0.000000] PM: hibernation: Registered nosave memory: [mem 0x76686000-0x76785fff]

[ 0.000000] PM: hibernation: Registered nosave memory [mem 0x76786000-0x777fefff]

[ 0.000000] Memory: 1172084K/1309604K available (16393K kernel code, 4374K rwdata, 10792K rodata, 3228K init, 6580K bss, 137260K reserved, OK


[ 0.025754] Freeing SMP alternatives memory: 40K

[ 0.955369] Freeing initrd memory: 63764K

[ 3.063509] Freeing unused decrypted mory: 2036K

[ 3.064575] Freeing unused kernel image (initmem) memory: 3228K

[ 3.065843] Freeing unused kernel image (text/rodata gap) memory: 2036K

[ 3.066450] Freeing unused kernel image (rodata/data gap) memory: 1496K
free -k; vmstats | head -n 1
Type total used free shared buff/cache available
Mem 1244944 732640 123252 67472 389052 288164
Swap 2097148 502332 1594816
 1244944 K total memory

sudo lshw -c video
       description: VGA compatible controller
       product: Core Processor Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 02
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:30 memory:90000000-903fffff memory:80000000-8fffffff ioport:5060(size=8) memory:c0000-dffff

and my graphics driver is using 256mb of ram and I have BIOS Here is the screenshot of my sysytem monitor, enter image description here

I also had tested the memtest and it is showing 1.2 gb of ram only.
I also had ubuntu 22.04lts long side with ubuntu 20.04Lts and when I compare ram given in settings>about of 20.04Lts it shows 1.2 gb but in 22.04lts it shows 2gb. I also searched whole askubuntu about this and didn't found anything about my problem. If you want any other information know me in the comments. Please give me the solution of it because I cant do anything on 1.2gb ram instead of 2gb ram.
I also want to say that earlier it shows 1.9 gb insted of 1.2 gb which is now.

Doug Smythies avatar
gn flag
Please edit your question adding output from `sudo dmesg | grep -i 'Memory:'` and `free -k ; vmstat -s | head -n 1`.
Feystray avatar
hr flag
Thanks,for fast reply.I will edit it in 2 minutes.
ar flag
Please don't put screenshots of the terminal in this site. Always copy the content of the terminal as text and paste it directly in your question. Then format the pasted text as `code` using the {_} icon above the edit question window.
ar flag
See this [Meta question and answers](
Feystray avatar
hr flag
I am sorry for that.I will edit it now.
cc flag
What video hardware/drivers are you using? Maybe your video card is "stealing" memory? What UEFI/BIOS settings might apply to sharing memory?
us flag
Feystray, we don't know if you don't tell us the hardware. Please list as many relevant facts about the hardware as you can including motherboard and GPU
cn flag

Integrated GPU uses system RAM. This is normal.

So your 800 MB are used by the Intel GPU.

Feystray avatar
hr flag
Can I reduce it?
Pilot6 avatar
cn flag
It depends on BIOS if there is a setting there.
Feystray avatar
hr flag
I cant find any settings
Pilot6 avatar
cn flag
Then you can't do anything. It is not related to OS. OS uses as much RAM as it is available.
Feystray avatar
hr flag
But it is 1.9gb earlier and recently after booting up I realized some slowness and found that it is only detecting 1.2 out of 2gb
ru flag
@Feystray If your GPU is an integrated graphics card that does NOT have dedicated graphics ram on it, then it will reserve a portion of the RAM (800MB is NOT unheard of) for the graphics, and that's reserved by the BIOS and firmware on your system for the GPU. Your only options would be to upgrade your RAM in the system to a higher capacity if the BIOS doesn't have any options to change the Intel GPU's allotment of RAM away from general system use and to the GPU.
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