Bug#684666: R: Bug#684666: R: Bug#684666: AMI BIOS detected: BIOS may corrupt low RAM, working around it.
>----Messaggio originale----
>Da: ben@decadent.org.uk
>Data: 23-ott-2012 3.02
>A: "asronchetti@libero.it"<asronchetti@libero.it>
>Cc: <684666@bugs.debian.org>, <stappers@stappers.nl>
>Ogg: Bug#684666: R: Bug#684666: AMI BIOS detected: BIOS may corrupt low RAM,
working around it.
>
>On Tue, 2012-10-23 at 02:55 +0200, asronchetti@libero.it wrote:
>> Hi,
>>
>> `uptime ` is:
>> 02:47:34 up 6 days, 6:23,
>>
>> and still no problem here.
>>
>> the combination SSD + 4gB RAM is working great.
>>
>> The only thing i changed was in /etc/fstab, i used "noatime,discard"
instead
>> of "default" in the options column for the /home partition (ext4).
>>
>> next test will start in the next days, with SSD + 8gB.
>>
>> I think that probably the problem resides in how my installation is
handling
>> the 8gB ram.
>>
>> Are there some special settings that i need to configure when switching
from a
>> 4gB ram to 8gB ram?
>
>No change should be necessary.
>
>One thing I should have thought of earlier is that a pair of different
>memory modules might not be reliable. In my personal experience, two
>different modules will often work, but it's generally recommended to use
>a matched set.
>
>Ben.
>
>--
>Ben Hutchings
>Humour is the best antidote to reality.
>
Hi,
(i'm still using SSD + 4gB , atm)
thanks for your reply.
dmidecode contains the string "Product Name: K52Jc"
I 've bought the 8gB on crucial.com. The site says that the hw they sell is
100% compatiple for my notebook.
It works like this:
i went on their website and then i entered "K52Jc" in the search form and then
the site presents me all available and compatible upgrades for my notebook
(K52Jc).
It showed me various SSD disks and only one RAM upgrade: 8gB.
According to dmidecode my mobo supports a maximum of 16gB of RAM, but checking
on asus.com it seems that the notebook only support a max of 8gB.
So i bought and SSD and the 8gB RAM.
I've the 8gB RAM in front of me and i can read on one of the two: "4GB DDR3 -
1333 (PC3 10600) SODI"
It is very similar to what i can see via dmidecode about the 4gB that are
mounted at the moment on my notebook:
4gB on dmidecode:
Handle 0x0041, DMI type 16, 15 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 16 GB
Error Information Handle: Not Provided
Number Of Devices: 4
Handle 0x0042, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x0041
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Form Factor: SODIMM
Set: None
Locator: DIMM0
Bank Locator: BANK 0
Type: DDR3
Type Detail: Synchronous
Speed: 1067 MHz
Manufacturer: Kinston
Serial Number: 923C7BB9
Asset Tag: Unknown
Part Number: ASU1333D3S9DR8/2G
Rank: Unknown
Handle 0x0043, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x0007FFFFFFF
Range Size: 2 GB
Physical Device Handle: 0x0042
Memory Array Mapped Address Handle: 0x004B
Partition Row Position: Unknown
Interleave Position: 1
Interleaved Data Depth: 1
Handle 0x0044, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x0041
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: DIMM1
Bank Locator: BANK 1
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: [Empty]
Serial Number: [Empty]
Asset Tag: Unknown
Part Number: [Empty]
Rank: Unknown
Handle 0x0045, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x0041
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Form Factor: SODIMM
Set: None
Locator: DIMM2
Bank Locator: BANK 2
Type: DDR3
Type Detail: Synchronous
Speed: 1067 MHz
Manufacturer: Kinston
Serial Number: 923CDEB1
Asset Tag: Unknown
Part Number: ASU1333D3S9DR8/2G
Rank: Unknown
Handle 0x0046, DMI type 20, 19 bytes
Memory Device Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x0007FFFFFFF
Range Size: 2 GB
Physical Device Handle: 0x0045
Memory Array Mapped Address Handle: 0x004B
Partition Row Position: Unknown
Interleave Position: 2
Interleaved Data Depth: 1
Handle 0x004A, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x0041
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: DIMM3
Bank Locator: BANK 3
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: [Empty]
Serial Number: [Empty]
Asset Tag: Unknown
Part Number: [Empty]
Rank: Unknown
Handle 0x004B, DMI type 19, 15 bytes
Memory Array Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x000FFFFFFFF
Range Size: 4 GB
Physical Array Handle: 0x0041
Partition Width: 4
the 4gB are 2x2gB DDR3 with speed 1067Mhz
the 8gB are 2x4gB DDR3 with speed 1066Mhz
the 2 x 2gB are the same each other and also the 2 x 4gB have one each other
the same label.
I only once noticed a difference between the 2 banks of the 4gB set and the 2
ones of the 4gB set: the thickness.
the ones of the 4gB set are ~1mm thick.
the new ones (the one of the 8gB set) are > 1mm.
the original ram fits well in the slots, but the new one doesnt go deep into
the slot.
I dont know if this is the cause of the problem, all i can say is that the OS
can detect all the 8gB RAM and that memtest86+ can be runned for over 24 hours
with no signaled problems.
I'll try the next combination (SSD + 8gB ram) some of the following days.
ciao
Asdrubale
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