Hi Ray, I can see the difference:
diff --git a/dmesg_working.log b/dmesg_broken.log index 79e34be..de76884 100644 --- a/dmesg_working.log +++ b/dmesg_broken.log @@ -59,7 +59,7 @@ reserve setup_data: [mem 0x00000000fee00000-0x00000000fee00fff] reserved -efi: ACPI=0xba282000 ACPI 2.0=0xba282000 SMBIOS=0xf0000 SMBIOS 3.0=0xf0020 TPMFinalLog=0xbabbe000 ESRT=0xbb0ca698 MEMATTR=0xb3db3018 MOKvar=0xbb29d000 RNG=0xba281018 TPMEventLog=0xa916b018 +efi: ACPI=0xba282000 ACPI 2.0=0xba282000 SMBIOS=0xf0000 SMBIOS 3.0=0xf0020 TPMFinalLog=0xbabbe000 ESRT=0xbb0ca698 MEMATTR=0xb4ee8018 MOKvar=0xbb29d000 RNG=0xba281018 TPMEventLog=0xa916b018 @@ -140,7 +140,7 @@ ACPI: Reserving DMAR table memory at [mem 0xba2b9290-0xba2b935b] -NODE_DATA(0) allocated [mem 0x43f7d5000-0x43f7fffff] +NODE_DATA(0) allocated [mem 0xb4ebc000-0xb4ee6fff] @@ -218,7 +218,7 @@ Dentry cache hash table entries: 2097152 (order: 12, 16777216 bytes, linear) -Memory: 16117124K/16648596K available (20480K kernel code, 4152K rwdata, 12720K rodata, 4764K init, 17540K bss, 531212K reserved, 0K cma-reserved) +Memory: 2505280K/16648596K available (20480K kernel code, 4152K rwdata, 12720K rodata, 4764K init, 17540K bss, 14143056K reserved, 0K cma-reserved) @@ -283,6 +283,7 @@ x86/fpu: xstate_offset[4]: 896, xstate_sizes[4]: 64 +efi: memattr: Failed to map EFI Memory Attributes table @ 0xb4ee8018 When everything works, you get your full 16gb: -Memory: 16117124K/16648596K available (20480K kernel code, 4152K rwdata, 12720K rodata, 4764K init, 17540K bss, 531212K reserved, 0K cma- reserved) and when it fails, you only get 2.5gb: +Memory: 2505280K/16648596K available (20480K kernel code, 4152K rwdata, 12720K rodata, 4764K init, 17540K bss, 14143056K reserved, 0K cma- reserved) The rest seems to be stuck in "reserved", but I looked at the e820 memory mapping and they were all the same. Very strange. When it doesn't work, we see: efi: memattr: Failed to map EFI Memory Attributes table @ 0xb4ee8018 If you look at 0xb4ee8018, that is on the EFI provided line: +efi: ACPI=0xba282000 ACPI 2.0=0xba282000 SMBIOS=0xf0000 SMBIOS 3.0=0xf0020 TPMFinalLog=0xbabbe000 ESRT=0xbb0ca698 MEMATTR=0xb4ee8018 MOKvar=0xbb29d000 RNG=0xba281018 which differs from 0xb3db3018 when things work correctly. It doesn't seem that you are alone either, these users also have the same issue, all with laptops: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1944019 https://www.reddit.com/r/openSUSE/comments/12besqn/tumbleweed_sometimes_the_system_only_recognizes/ https://askubuntu.com/questions/1365324/ubuntu-reports-significantly-less-ram-that-i-actually-have They all had the same "efi: memattr: Failed to map EFI Memory Attributes table @ 0xb4ee8018" error. I checked your BIOS version, and it seems to be the latest, at version 1.26.0: [ 0.000000] DMI: Dell Inc. Latitude 3590/09GV6M, BIOS 1.26.0 06/13/2023 https://www.dell.com/support/home/en-nz/product- support/product/latitude-15-3590-laptop/drivers One of the users in the bug report ran a system diagnostic from the BIOS. Could you boot into that and run it? It might do a memory check and maybe tweak the EFI memory layout to work. One of the other users found that a USB-C dock they were plugged into was causing the issues. Can you boot a few times with everything unplugged from your laptop, and then a few times with things plugged in? Does it only occur when a specific device is plugged in? Hopefully that will give you something to try for the moment. Thanks, Matthew -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-6.2 in Ubuntu. https://bugs.launchpad.net/bugs/2039382 Title: Kernel cannot detect the full memory Status in linux-signed-hwe-6.2 package in Ubuntu: New Bug description: Hi ubuntu, I use ubuntu22.04 in my laptop. When I open the laptop, sometimes ubuntu cannot detect all memory. My laptop has 16GB memory, sometimes ubuntu detect 2.5GB. I already use memtest86 test the health of the memory. It doesn’t show any error. I think this problem is from the OS. Please help me! Thank you very much Ray PS. uname -a: Linux ubuntu 6.2.0-34-generic #34~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Sep 7 13:12:03 UTC 2 x86_64 x86_64 x86_64 GNU/Linux lshw -C memory: *-firmware description: BIOS vendor: Dell Inc. physical id: 0 version: 1.26.0 date: 06/13/2023 size: 64KiB capacity: 16MiB capabilities: pci pnp upgrade shadowing cdboot bootselect edd int13floppynec int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb smartbattery biosbootspecification netboot uefi *-memory description: System Memory physical id: 41 slot: System board or motherboard size: 16GiB *-bank:0 description: DIMM [empty] physical id: 0 slot: ChannelA-DIMM0 *-bank:1 description: SODIMM DDR4 Synchronous Unbuffered (Unregistered) 2400 MHz (0.4 ns) product: HMA82GS6AFR8N-UH vendor: Hynix Semiconductor (Hyundai Electronics) physical id: 1 serial: 4247000D slot: DIMM B size: 16GiB width: 64 bits clock: 2400MHz (0.4ns) *-cache:0 description: L1 cache physical id: 45 slot: L1 Cache size: 256KiB capacity: 256KiB capabilities: synchronous internal write-back unified configuration: level=1 *-cache:1 description: L2 cache physical id: 46 slot: L2 Cache size: 1MiB capacity: 1MiB capabilities: synchronous internal write-back unified configuration: level=2 *-cache:2 description: L3 cache physical id: 47 slot: L3 Cache size: 6MiB capacity: 6MiB capabilities: synchronous internal write-back unified configuration: level=3 *-memory UNCLAIMED description: Memory controller product: Sunrise Point-LP PMC vendor: Intel Corporation physical id: 1f.2 bus info: pci@0000:00:1f.2 version: 21 width: 32 bits clock: 33MHz (30.3ns) configuration: latency=0 resources: memory:df42c000-df42ffff ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: linux-image-6.2.0-34-generic 6.2.0-34.34~22.04.1 ProcVersionSignature: Ubuntu 6.2.0-34.34~22.04.1-generic 6.2.16 Uname: Linux 6.2.0-34-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.5 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sun Oct 15 17:53:09 2023 InstallationDate: Installed on 2023-10-08 (7 days ago) InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.2) SourcePackage: linux-signed-hwe-6.2 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-6.2/+bug/2039382/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
