Arch Linux

desper

Member

Registered: 2008-04-16

Posts: 9

[solved] Missing 1G Memory, arch64. How to find back?

It was a bios issue.
After flashing the bios to 1.1o, free -m reports satisfactory 3879m memory
the acer flashtool supports Vista and Dos.

------------------------------------------------------------
It seems a piece of common knowledge that Arch64 supports 4G + memory, and I have no doubt of that.
But I still have 1G memory missing after switching to Arch64.
Probably reserved for the video, which shares up to 1G mem? 

The laptop is an acer aspire 5735, with 4G mem, and intel 4500MHD 

Someone could do diagnosis for the machine?
I've spent some time searching  without getting solid answers.
Many thanks

BIOS reports 4G

[desper@T ~]$ free -m
             total       used       free     shared    buffers     cached
Mem:          2947        356       2591          0         40        131
-/+ buffers/cache:        184       2762
Swap:         2000          0       2000

[desper@T ~]$ dmesg | grep memory
Scanning 0 areas for low memory corruption
init_memory_mapping: 0000000000000000-00000000bbc00000
PM: Registered nosave memory: 000000000009d000 - 000000000009e000
PM: Registered nosave memory: 000000000009e000 - 00000000000a0000
PM: Registered nosave memory: 00000000000a0000 - 00000000000e4000
PM: Registered nosave memory: 00000000000e4000 - 0000000000100000
PM: Registered nosave memory: 00000000bb6a1000 - 00000000bb6a7000
PM: Registered nosave memory: 00000000bb7bc000 - 00000000bb80f000
PM: Registered nosave memory: 00000000bb908000 - 00000000bbb0f000
PM: Registered nosave memory: 00000000bbb19000 - 00000000bbb1f000
PM: Registered nosave memory: 00000000bbb64000 - 00000000bbb9f000
PM: Registered nosave memory: 00000000bbbe2000 - 00000000bbbff000
Freeing initrd memory: 783k freed
Scanning for low memory corruption every 60 seconds
Freeing unused kernel memory: 392k freed
agpgart-intel 0000:00:00.0: detected 65532K stolen memory

Last edited by desper (2009-04-10 16:02:35)

fumbles

Member

Registered: 2006-12-22

Posts: 246

Re: [solved] Missing 1G Memory, arch64. How to find back?

Check your bios settings, something like "Remap memory over 4GB limit" - it will make more sense then that....

bender02

Member

From: UK

Registered: 2007-02-04

Posts: 1,328

Re: [solved] Missing 1G Memory, arch64. How to find back?

Also you can see how much of VideoRAM is in use by looking at /var/log/Xorg.0.log and grepping for 'VideoRAM'.

desper

Member

Registered: 2008-04-16

Posts: 9

Re: [solved] Missing 1G Memory, arch64. How to find back?

Thanks a lot for the replies.

Check your bios settings, something like "Remap memory over 4GB limit" - it will make more sense then that....

The BIOS is quite primitive, i will check after this posting and report back
It says the "extended memory"  is 4g, but unfortunately metions nothing about Remapping.

Also you can see how much of VideoRAM is in use by looking at /var/log/Xorg.0.log and grepping for 'VideoRAM'.

intel(0): VideoRam: 262144 KB

It seems Video is normal, and the problem exists beyond the video memory reservation, if I understand the following line correctly 

(II) intel(0): I830CheckAvailableMemory: 2927612 kB available

by the way, Vista recognized full 4G mem. I have had a peek of the system info before I deleted the MS os.....

Last edited by desper (2009-04-09 12:36:41)

Cheesebaron

Member

From: Denmark

Registered: 2008-10-31

Posts: 65

Website

Re: [solved] Missing 1G Memory, arch64. How to find back?

Is highmem enabled?

---

IBM Thinkpad X60 Tablet | Zen-sources | My AUR Builds

desper

Member

Registered: 2008-04-16

Posts: 9

Re: [solved] Missing 1G Memory, arch64. How to find back?

zcat /proc/config.gz | grep HIGHMEM
gives nothing.

I thought  it is not necessary for arch64 (2.6.29-ARCH x86_64) to have highmem.
now i am doubting... ... am i missing some modules perhaps ?
i am using the generic 22.6.9 kernel from the testing repo.

Maybe it's just hardware problem
some guys reported problems of no remapping option in bios on acer laptop,
which i dn't understand at all.

Last edited by desper (2009-04-09 14:57:59)