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6872 Mo de RAM pour 8 Go d'après le BIOS ‽

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David Guyot
--=-tUA1QKs3nhE/d48G5499
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Cher tous,

J'ai un probl=C3=A8me avec ma Jessie amd64 =C3=A0 jour sur une CM Asus A88X=
M-PLUS
avec un UEFI =C3=A0 jour : j'ai deux barettes de 4 Go install=C3=A9es, d=C3=
=A9tect=C3=A9es
comme telles par l'UEFI, mais la b=C3=A9cane refuse d'en exploiter plus de
6872 Mo. Je pr=C3=A9cise qu'un probl=C3=A8me mat=C3=A9riel est tr=C3=A8s im=
probable car une
autre b=C3=A9cane avec la m=C3=AAme configuration mat=C3=A9rielle et logici=
elle
pr=C3=A9sente le m=C3=AAme probl=C3=A8me. J'ai parcouru l'UEFI dans tous le=
s sens pour
trouver un param=C3=A8tre li=C3=A9 =C3=A0 la m=C3=A9moire, mais je ne pouva=
is y changer que
la fr=C3=A9quence et la tension. Le plus =C3=A9trange est que certaines com=
mandes
montrent bien les 8 Go mat=C3=A9riels, d'autres non :
$ > free -m
total used free shared buffers
cached
Mem: 6872 2558 4314 53 47
793
-/+ buffers/cache: 1716 5155
Swap: 14223 0 14223
# > dmidecode
[=E2=80=A6]
Handle 0x002F, DMI type 16, 23 bytes
Physical Memory Array
Location: System Board Or Motherboard
Use: System Memory
Error Correction Type: None
Maximum Capacity: 64 GB
Error Information Handle: Not Provided
Number Of Devices: 4

Handle 0x0030, DMI type 19, 31 bytes
Memory Array Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x00FFFFFFFFF
Range Size: 64 GB
Physical Array Handle: 0x002F
Partition Width: 255

Handle 0x0031, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x002F
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: DIMM
Set: None
Locator: DIMM_A1
Bank Locator: A1_BANK0
Type: DDR3
Type Detail: Synchronous Unbuffered (Unregistered)
Speed: 1600 MHz
Manufacturer: A1_Manufacturer1
Serial Number: A1_SerNum1
Asset Tag: A1_AssetTagNum1
Part Number: Array1_PartNumber1
Rank: Unknown
Configured Clock Speed: 1600 MHz

Handle 0x0032, DMI type 20, 35 bytes
Memory Device Mapped Address
Starting Address: 0x00000000000
Ending Address: 0x000FFFFFFFF
Range Size: 4 GB
Physical Device Handle: 0x0031
Memory Array Mapped Address Handle: 0x0030
Partition Row Position: 1

Handle 0x0033, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x002F
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: Unknown
Set: None
Locator: DIMM_A2
Bank Locator: A1_BANK1
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: A1_Manufacturer0
Serial Number: A1_SerNum0
Asset Tag: A1_AssetTagNum0
Part Number: Array1_PartNumber0
Rank: Unknown
Configured Clock Speed: Unknown

Handle 0x0034, DMI type 126, 35 bytes
Inactive

Handle 0x0035, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x002F
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: DIMM
Set: None
Locator: DIMM_B1
Bank Locator: A1_BANK2
Type: DDR3
Type Detail: Synchronous Unbuffered (Unregistered)
Speed: 1600 MHz
Manufacturer: Undefined =20
Serial Number: 00000000 =20
Asset Tag: A1_AssetTagNum2
Part Number: F3-2133C9-4GXL =20
Rank: 2
Configured Clock Speed: 1600 MHz

Handle 0x0036, DMI type 20, 35 bytes
Memory Device Mapped Address
Starting Address: 0x00100000000
Ending Address: 0x001FFFFFFFF
Range Size: 4 GB
Physical Device Handle: 0x0035
Memory Array Mapped Address Handle: 0x0030
Partition Row Position: 1

Handle 0x0037, DMI type 17, 34 bytes
Memory Device
Array Handle: 0x002F
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: 64 bits
Size: No Module Installed
Form Factor: Unknown
Set: None
Locator: DIMM_B2
Bank Locator: A1_BANK3
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: A1_Manufacturer3
Serial Number: A1_SerNum3
Asset Tag: A1_AssetTagNum3
Part Number: Array1_PartNumber3
Rank: Unknown
Configured Clock Speed: Unknown
[=E2=80=A6]
$ > sudo lshw
[=E2=80=A6]
*-memory
description: M=C3=A9moire syst=C3=A8me
identifiant mat=C3=A9riel: 0
taille: 6872MiB
*-cpu
produit: AMD A10-7700K Radeon R7, 10 Compute Cores 4C+6G
[=E2=80=A6]
$ > dmesg
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 3.16.0-4-amd64
(debian-kernel@lists.debian.org) (gcc version 4.8.4 (Debian 4.8.4-1) )
#1 SMP Debian 3.16.7-ckt11-1 (2015-05-24)
[ 0.000000] Command line: BOOT_IMAGE=3D/vmlinuz-3.16.0-4-amd64
root=3D/dev/mapper/Aethelthryth--vg-root ro quiet
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009e7ff]
usable
[ 0.000000] BIOS-e820: [mem 0x000000000009e800-0x000000000009ffff]
reserved
[ 0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff]
reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000009d26efff]
usable
[ 0.000000] BIOS-e820: [mem 0x000000009d26f000-0x000000009d29efff]
reserved
[ 0.000000] BIOS-e820: [mem 0x000000009d29f000-0x000000009d2aefff]
ACPI data
[ 0.000000] BIOS-e820: [mem 0x000000009d2af000-0x000000009d7eafff]
ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x000000009d7eb000-0x000000009e3e5fff]
reserved
[ 0.000000] BIOS-e820: [mem 0x000000009e3e6000-0x000000009e3e6fff]
usable
[ 0.000000] BIOS-e820: [mem 0x000000009e3e7000-0x000000009e5ecfff]
ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x000000009e5ed000-0x000000009ea32fff]
usable
[ 0.000000] BIOS-e820: [mem 0x000000009ea33000-0x000000009eff3fff]
reserved
[ 0.000000] BIOS-e820: [mem 0x000000009eff4000-0x000000009effffff]
usable
[ 0.000000] BIOS-e820: [mem 0x00000000f8000000-0x00000000fbffffff]
reserved
[ 0.000000] BIOS-e820: [mem 0x00000000feb80000-0x00000000fec01fff]
reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fec10000-0x00000000fec10fff]
reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed00000-0x00000000fed00fff]
reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed40000-0x00000000fed44fff]
reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed80000-0x00000000fed8ffff]
reserved
[ 0.000000] BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff]
reserved
[ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000021effffff]
usable
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] SMBIOS 2.7 present.
[ 0.000000] DMI: System manufacturer System Product Name/A88XM-PLUS,
BIOS 2302 04/28/2015
[ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable =3D=3D>
reserved
[ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.000000] AGP: No AGP bridge found
[ 0.000000] e820: last_pfn =3D 0x21f000 max_arch_pfn =3D 0x400000000
[ 0.000000] MTRR default type: uncachable
[ 0.000000] MTRR fixed ranges enabled:
[ 0.000000] 00000-9FFFF write-back
[ 0.000000] A0000-BFFFF write-through
[ 0.000000] C0000-CFFFF write-protect
[ 0.000000] D0000-E7FFF uncachable
[ 0.000000] E8000-FFFFF write-protect
[ 0.000000] MTRR variable ranges enabled:
[ 0.000000] 0 base 000000000000 mask FFFF80000000 write-back
[ 0.000000] 1 base 000080000000 mask FFFFE0000000 write-back
[ 0.000000] 2 disabled
[ 0.000000] 3 disabled
[ 0.000000] 4 disabled
[ 0.000000] 5 disabled
[ 0.000000] 6 disabled
[ 0.000000] 7 disabled
[ 0.000000] TOM2: 000000021f000000 aka 8688M
[ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new
0x7010600070106
[ 0.000000] e820: update [mem 0xa0000000-0xffffffff] usable =3D=3D>
reserved
[ 0.000000] e820: last_pfn =3D 0x9f000 max_arch_pfn =3D 0x400000000
[ 0.000000] found SMP MP-table at [mem 0x000fd710-0x000fd71f] mapped
at [ffff8800000fd710]
[ 0.000000] Base memory trampoline at [ffff880000098000] 98000 size
24576
[ 0.000000] Using GB pages for direct mapping
[ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[ 0.000000] [mem 0x00000000-0x000fffff] page 4k
[ 0.000000] BRK [0x01af4000, 0x01af4fff] PGTABLE
[ 0.000000] BRK [0x01af5000, 0x01af5fff] PGTABLE
[ 0.000000] BRK [0x01af6000, 0x01af6fff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x21ee00000-0x21effffff]
[ 0.000000] [mem 0x21ee00000-0x21effffff] page 2M
[ 0.000000] BRK [0x01af7000, 0x01af7fff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x21c000000-0x21edfffff]
[ 0.000000] [mem 0x21c000000-0x21edfffff] page 2M
[ 0.000000] init_memory_mapping: [mem 0x200000000-0x21bffffff]
[ 0.000000] [mem 0x200000000-0x21bffffff] page 2M
[ 0.000000] init_memory_mapping: [mem 0x00100000-0x9d26efff]
[ 0.000000] [mem 0x00100000-0x001fffff] page 4k
[ 0.000000] [mem 0x00200000-0x3fffffff] page 2M
[ 0.000000] [mem 0x40000000-0x7fffffff] page 1G
[ 0.000000] [mem 0x80000000-0x9d1fffff] page 2M
[ 0.000000] [mem 0x9d200000-0x9d26efff] page 4k
[ 0.000000] init_memory_mapping: [mem 0x9e3e6000-0x9e3e6fff]
[ 0.000000] [mem 0x9e3e6000-0x9e3e6fff] page 4k
[ 0.000000] BRK [0x01af8000, 0x01af8fff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x9e5ed000-0x9ea32fff]
[ 0.000000] [mem 0x9e5ed000-0x9e5fffff] page 4k
[ 0.000000] [mem 0x9e600000-0x9e9fffff] page 2M
[ 0.000000] [mem 0x9ea00000-0x9ea32fff] page 4k
[ 0.000000] BRK [0x01af9000, 0x01af9fff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x9eff4000-0x9effffff]
[ 0.000000] [mem 0x9eff4000-0x9effffff] page 4k
[ 0.000000] init_memory_mapping: [mem 0x100000000-0x1ffffffff]
[ 0.000000] [mem 0x100000000-0x1ffffffff] page 1G
[ 0.000000] RAMDISK: [mem 0x35e22000-0x36f08fff]
[ 0.000000] ACPI: Early table checksum verification disabled
[ 0.000000] ACPI: RSDP 0x00000000000F0490 000024 (v02 ALASKA)
[ 0.000000] ACPI: XSDT 0x000000009D2A6080 000074 (v01 ALASKA A M I
01072009 AMI 00010013)
[ 0.000000] ACPI: FACP 0x000000009D2AD5D8 00010C (v05 ALASKA A M I
01072009 AMI 00010013)
[ 0.000000] ACPI BIOS Warning (bug): Optional FADT field
Pm2ControlBlock has zero address or length: 0x0000000000000000/0x1
(20140424/tbfadt-649)
[ 0.000000] ACPI: DSDT 0x000000009D2A6188 00744C (v02 ALASKA A M I
00000000 INTL 20051117)
[ 0.000000] ACPI: FACS 0x000000009D7E0080 000040
[ 0.000000] ACPI: APIC 0x000000009D2AD6E8 00007E (v03 ALASKA A M I
01072009 AMI 00010013)
[ 0.000000] ACPI: FPDT 0x000000009D2AD768 000044 (v01 ALASKA A M I
01072009 AMI 00010013)
[ 0.000000] ACPI: MCFG 0x000000009D2AD7B0 00003C (v01 ALASKA A M I
01072009 MSFT 00010013)
[ 0.000000] ACPI: BGRT 0x000000009D2AED48 000038 (v00 ALASKA A M I
01072009 AMI 00010013)
[ 0.000000] ACPI: HPET 0x000000009D2AD848 000038 (v01 ALASKA A M I
01072009 AMI 00000005)
[ 0.000000] ACPI: UEFI 0x000000009D2AD880 000042 (v01 ALASKA A M I
01072009 00000000)
[ 0.000000] ACPI: SSDT 0x000000009D2AD8C8 000B9C (v01 AMD BANTRY
00000001 AMD 00000001)
[ 0.000000] ACPI: SSDT 0x000000009D2AE468 00033B (v02 AMD BANTRY
00000002 MSFT 04000000)
[ 0.000000] ACPI: CRAT 0x000000009D2AE7A8 0005A0 (v01 AMD BANTRY
00000001 AMD 00000001)
[ 0.000000] ACPI: Local APIC address 0xfee00000
[ 0.000000] No NUMA configuration found
[ 0.000000] Faking a node at [mem
0x0000000000000000-0x000000021effffff]
[ 0.000000] Initmem setup node 0 [mem 0x00000000-0x21effffff]
[ 0.000000] NODE_DATA [mem 0x21eff7000-0x21effbfff]
[ 0.000000] [ffffea0000000000-ffffea00077fffff] PMD ->
[ffff880217600000-ffff88021d9fffff] on node 0
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x00001000-0x00ffffff]
[ 0.000000] DMA32 [mem 0x01000000-0xffffffff]
[ 0.000000] Normal [mem 0x100000000-0x21effffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00001000-0x0009dfff]
[ 0.000000] node 0: [mem 0x00100000-0x9d26efff]
[ 0.000000] node 0: [mem 0x9e3e6000-0x9e3e6fff]
[ 0.000000] node 0: [mem 0x9e5ed000-0x9ea32fff]
[ 0.000000] node 0: [mem 0x9eff4000-0x9effffff]
[ 0.000000] node 0: [mem 0x100000000-0x21effffff]
[ 0.000000] On node 0 totalpages: 1820255
[ 0.000000] DMA zone: 56 pages used for memmap
[ 0.000000] DMA zone: 21 pages reserved
[ 0.000000] DMA zone: 3997 pages, LIFO batch:0
[ 0.000000] DMA32 zone: 8760 pages used for memmap
[ 0.000000] DMA32 zone: 640706 pages, LIFO batch:31
[ 0.000000] Normal zone: 16072 pages used for memmap
[ 0.000000] Normal zone: 1175552 pages, LIFO batch:31
[ 0.000000] ACPI: PM-Timer IO Port: 0x808
[ 0.000000] ACPI: Local APIC address 0xfee00000
[ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x10] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x11] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x12] enabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x13] enabled)
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])
[ 0.000000] ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0])
[ 0.000000] IOAPIC[0]: apic_id 0, version 33, address 0xfec00000, GSI
0-23
[ 0.000000] ACPI: IOAPIC (id[0x01] address[0xfec01000] gsi_base[24])
[ 0.000000] IOAPIC[1]: apic_id 1, version 33, address 0xfec01000, GSI
24-55
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low
level)
[ 0.000000] ACPI: IRQ0 used by override.
[ 0.000000] ACPI: IRQ2 used by override.
[ 0.000000] ACPI: IRQ9 used by override.
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] ACPI: HPET id: 0x10228210 base: 0xfed00000
[ 0.000000] smpboot: Allowing 4 CPUs, 0 hotplug CPUs
[ 0.000000] nr_irqs_gsi: 72
[ 0.000000] PM: Registered nosave memory: [mem 0x0009e000-0x0009efff]
[ 0.000000] PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000dffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000e0000-0x000fffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x9d26f000-0x9d29efff]
[ 0.000000] PM: Registered nosave memory: [mem 0x9d29f000-0x9d2aefff]
[ 0.000000] PM: Registered nosave memory: [mem 0x9d2af000-0x9d7eafff]
[ 0.000000] PM: Registered nosave memory: [mem 0x9d7eb000-0x9e3e5fff]
[ 0.000000] PM: Registered nosave memory: [mem 0x9e3e7000-0x9e5ecfff]
[ 0.000000] PM: Registered nosave memory: [mem 0x9ea33000-0x9eff3fff]
[ 0.000000] PM: Registered nosave memory: [mem 0x9f000000-0xf7ffffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xf8000000-0xfbffffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfc000000-0xfeb7ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfeb80000-0xfec01fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfec02000-0xfec0ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfec10000-0xfec10fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfec11000-0xfecfffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed00000-0xfed00fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed01000-0xfed3ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed40000-0xfed44fff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed45000-0xfed7ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed80000-0xfed8ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xfed90000-0xfeffffff]
[ 0.000000] PM: Registered nosave memory: [mem 0xff000000-0xffffffff]
[ 0.000000] e820: [mem 0x9f000000-0xf7ffffff] available for PCI
devices
[ 0.000000] Booting paravirtualized kernel on bare hardware
[ 0.000000] setup_percpu: NR_CPUS:512 nr_cpumask_bits:512
nr_cpu_ids:4 nr_node_ids:1
[ 0.000000] PERCPU: Embedded 27 pages/cpu @ffff88021ec00000 s80896
r8192 d21504 u524288
[ 0.000000] pcpu-alloc: s80896 r8192 d21504 u524288 alloc=3D1*2097152
[ 0.000000] pcpu-alloc: [0] 0 1 2 3=20
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on.
Total pages: 1795346
[ 0.000000] Policy zone: Normal
[ 0.000000] Kernel command line: BOOT_IMAGE=3D/vmlinuz-3.16.0-4-amd64
root=3D/dev/mapper/Aethelthryth--vg-root ro quiet
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340
[ 0.000000] AGP: Checking aperture...
[ 0.000000] AGP: No AGP bridge found
[ 0.000000] AGP: Node 0: aperture [bus addr 0x00000000-0x01ffffff]
(32MB)
[ 0.000000] AGP: Your BIOS doesn't leave a aperture memory hole
[ 0.000000] AGP: Please enable the IOMMU option in the BIOS setup
[ 0.000000] AGP: This costs you 64MB of RAM
[ 0.000000] AGP: Mapping aperture over RAM [mem
0x94000000-0x97ffffff] (65536KB)
[ 0.000000] PM: Registered nosave memory: [mem 0x94000000-0x97ffffff]
[ 0.000000] Memory: 7017680K/7281020K available (5209K kernel code,
946K rwdata, 1832K rodata, 1204K init, 840K bss, 263340K reserved)
[=E2=80=A6]

Pour dmesg, j'ai arr=C3=AAt=C3=A9 la sortie =C3=A0 la ligne o=C3=B9 il est =
manifeste que le
syst=C3=A8me ne d=C3=A9tecte pas tout ce qu'il devrait en RAM, donc la r=C3=
=A9ponse
doit =C3=AAtre situ=C3=A9e dans ce qui pr=C3=A9c=C3=A8de cette ligne, mais =
je n'en sais pas
encore assez sur ces messages pour les analyser correctement. Quelqu'un
de meilleur que moi verrait-il de quoi il retourne ?

Dans l'attente de vos suggestions,

Cordialement.
--=20
David Guyot

--=-tUA1QKs3nhE/d48G5499
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3 réponses

Avatar
Christophe
Le 09/07/2015 15:47, David Guyot a écrit :
Le plus étrange est que certaines commandes
montrent bien les 8 Go matériels, d'autres non :
$ > free -m
total used free shared buffers
cached
Mem: 6872 2558 4314 53 47
793
-/+ buffers/cache: 1716 5155
Swap: 14223 0 14223
# > dmidecode
[…]




A mon avis, c'est la puce vidéo intégré au CPU (enfin à l'APU) qui est à
l'origine cette différence.

1Go pour le GPU, le reste pour le CPU.




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Frederic MASSOT
Le 09/07/2015 15:47, David Guyot a écrit :
Cher tous,

J'ai un problème avec ma Jessie amd64 à jour sur une CM Asus A88XM-PLUS
avec un UEFI à jour : j'ai deux barettes de 4 Go installées, détectées
comme telles par l'UEFI, mais la bécane refuse d'en exploiter plus de
6872 Mo. Je précise qu'un problème matériel est très improbable car une
autre bécane avec la même configuration matérielle et logicielle
présente le même problème. J'ai parcouru l'UEFI dans tous les sens pour
trouver un paramètre lié à la mémoire, mais je ne pouvais y changer que
la fréquence et la tension. Le plus étrange est que certaines commandes
montrent bien les 8 Go matériels, d'autres non :



Les chipsets (vidéo, PCI, etc) réserve de la mémoire pour leurs usages.

Regardes dans le BIOS dans la partie vidéo, tu dois avoir une option
"Memory Remap Feature", vérifie qu'elle est bien activée.


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============================================= | FRÉDÉRIC MASSOT |
| http://www.juliana-multimedia.com |
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| +33.(0)2.97.54.77.94 +33.(0)6.67.19.95.69 |
==========================Þbian=GNU/Linux==
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David Guyot
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Au cas où d'autres ont le même problème avec cette carte-m ère, il faut
aller dans le menu avancé de l'UEFI, puis dans Advanced → NB
Configuration ; de là, il faut faire apparaître le réglage e n forçant
l'activation du GPU intégré — « Integrated Graphics » à « Force » —,
puis en jouant avec le réglage « UMA Frame Buffer Size ». La situation
que je présentais était celle donnée par le réglage par défaut, à savoir
« Auto ».

Merci pour votre aide !

Cordialement.

Le jeudi 09 juillet 2015 à 16:51 +0200, Frederic MASSOT a écrit :
Le 09/07/2015 15:47, David Guyot a écrit :
> Cher tous,
>
> J'ai un problème avec ma Jessie amd64 à jour sur une CM Asus A88XM-PLUS
> avec un UEFI à jour : j'ai deux barettes de 4 Go installées, détectées
> comme telles par l'UEFI, mais la bécane refuse d'en exploiter plus de
> 6872 Mo. Je précise qu'un problème matériel est trè s improbable car une
> autre bécane avec la même configuration matérielle et lo gicielle
> présente le même problème. J'ai parcouru l'UEFI dans tou s les sens pour
> trouver un paramètre lié à la mémoire, mais je ne p ouvais y changer que
> la fréquence et la tension. Le plus étrange est que certaines commandes
> montrent bien les 8 Go matériels, d'autres non :

Les chipsets (vidéo, PCI, etc) réserve de la mémoire pour leurs usages.

Regardes dans le BIOS dans la partie vidéo, tu dois avoir une option
"Memory Remap Feature", vérifie qu'elle est bien activée.


--
======================== ======================
| FRÉDÉRIC MASSOT |
| http://www.juliana-multimedia.com |
| mailto: |
| +33.(0)2.97.54.77.94 +33.(0)6.67.19.95.69 |
======================== ==Þbian=GNU/Linux===




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David Guyot
Administrateur système, réseau et télécom / Sysadmin
Europe Camions Interactive / Stockway
Moulin Collot
F-88500 Ambacourt
03 29 30 47 85

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