kernel 2.6.27-9-server sees only 3GB of RAM on a32 bit system with PAE support

Asked by William Marques

I have upgrade my notebook to 4GB of RAM today, confirmed on BIOS (4096 MB)
Later I have installed the kernel 2.6.27-9-server, on a Ubuntu 8.10 up-to-date install, but it only sees 3GB of RAM.

Some information about my Hardware:
Notebook Toshiba Tecra A8
Processor:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 14
model name : Genuine Intel(R) CPU T2300 @ 1.66GHz
stepping : 8
cpu MHz : 1000.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon bts pni monitor est tm2 xtpr
bogomips : 3324.98
clflush size : 64
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 14
model name : Genuine Intel(R) CPU T2300 @ 1.66GHz
stepping : 8
cpu MHz : 1000.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon bts pni monitor est tm2 xtpr
bogomips : 3325.04
clflush size : 64
power management:

I have istalled 2 banks of RAM, with the same speed (667MHz) an brand (Markvision)

Memory info:

MemTotal: 3363412 kB
MemFree: 2368112 kB
Buffers: 63352 kB
Cached: 425388 kB
SwapCached: 0 kB
Active: 490316 kB
Inactive: 316576 kB
HighTotal: 2481792 kB
HighFree: 1730916 kB
LowTotal: 881620 kB
LowFree: 637196 kB
SwapTotal: 1052216 kB
SwapFree: 1052216 kB
Dirty: 8 kB
Writeback: 0 kB
AnonPages: 318152 kB
Mapped: 69048 kB
Slab: 49512 kB
SReclaimable: 33168 kB
SUnreclaim: 16344 kB
PageTables: 4440 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 2733920 kB
Committed_AS: 626396 kB
VmallocTotal: 114680 kB
VmallocUsed: 8332 kB
VmallocChunk: 105972 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 129024 kB
DirectMap2M: 788480 kB

lspci -vv
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
 Latency: 0
 Capabilities: [e0] Vendor Specific Information <?>
 Kernel driver in use: agpgart-intel
 Kernel modules: intel-agp

00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
 Subsystem: Toshiba America Info Systems Device 0006
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin A routed to IRQ 16
 Region 0: Memory at ffd80000 (32-bit, non-prefetchable) [size=512K]
 Region 1: I/O ports at cff8 [size=8]
 Region 2: Memory at e0000000 (32-bit, prefetchable) [size=256M]
 Region 3: Memory at ffd40000 (32-bit, non-prefetchable) [size=256K]
 Capabilities: [90] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable-
  Address: 00000000 Data: 0000
 Capabilities: [d0] Power Management version 2
  Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 Kernel modules: intelfb

00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
 Subsystem: Toshiba America Info Systems Device 0006
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Region 0: Memory at ffc80000 (32-bit, non-prefetchable) [size=512K]
 Capabilities: [d0] Power Management version 2
  Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0, Cache Line Size: 32 bytes
 Interrupt: pin A routed to IRQ 22
 Region 0: Memory at ffd3c000 (64-bit, non-prefetchable) [size=16K]
 Capabilities: [50] Power Management version 2
  Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
  Address: 0000000000000000 Data: 0000
 Capabilities: [70] Express (v1) Root Complex Integrated Endpoint, MSI 00
  DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
   ExtTag- RBE- FLReset-
  DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
   RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
   MaxPayload 128 bytes, MaxReadReq 128 bytes
  DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
  LnkCap: Port #0, Speed unknown, Width x0, ASPM unknown, Latency L0 <64ns, L1 <1us
   ClockPM- Suprise- LLActRep- BwNot-
  LnkCtl: ASPM Disabled; Disabled- Retrain- CommClk-
   ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
 Capabilities: [100] Virtual Channel <?>
 Capabilities: [130] Root Complex Link <?>
 Kernel driver in use: HDA Intel
 Kernel modules: snd-hda-intel

00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 02)
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0, Cache Line Size: 32 bytes
 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
 I/O behind bridge: 0000b000-0000bfff
 Memory behind bridge: ffa00000-ffafffff
 Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
 BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
  PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
 Capabilities: [40] Express (v1) Root Port (Slot-), MSI 00
  DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited
   ExtTag- RBE- FLReset-
  DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+
   RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
   MaxPayload 128 bytes, MaxReadReq 128 bytes
  DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
  LnkCap: Port #1, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <256ns, L1 <4us
   ClockPM- Suprise- LLActRep+ BwNot-
  LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+
   ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt- ABWMgmt-
  RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible-
  RootCap: CRSVisible-
  RootSta: PME ReqID 0000, PMEStatus- PMEPending-
 Capabilities: [80] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable+
  Address: fee0300c Data: 41c1
 Capabilities: [90] Subsystem: Toshiba America Info Systems Device 0001
 Capabilities: [a0] Power Management version 2
  Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 Capabilities: [100] Virtual Channel <?>
 Capabilities: [180] Root Complex Link <?>
 Kernel driver in use: pcieport-driver
 Kernel modules: shpchp

00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3 (rev 02)
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0, Cache Line Size: 32 bytes
 Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
 Memory behind bridge: ff900000-ff9fffff
 Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
 BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
  PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
 Capabilities: [40] Express (v1) Root Port (Slot-), MSI 00
  DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited
   ExtTag- RBE- FLReset-
  DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+
   RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
   MaxPayload 128 bytes, MaxReadReq 128 bytes
  DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
  LnkCap: Port #3, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <256ns, L1 <4us
   ClockPM- Suprise- LLActRep+ BwNot-
  LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
   ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt- ABWMgmt-
  RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible-
  RootCap: CRSVisible-
  RootSta: PME ReqID 0000, PMEStatus- PMEPending-
 Capabilities: [80] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable+
  Address: fee0300c Data: 41c9
 Capabilities: [90] Subsystem: Toshiba America Info Systems Device 0001
 Capabilities: [a0] Power Management version 2
  Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 Capabilities: [100] Virtual Channel <?>
 Capabilities: [180] Root Complex Link <?>
 Kernel driver in use: pcieport-driver
 Kernel modules: shpchp

00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 02)
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin A routed to IRQ 23
 Region 4: I/O ports at afe0 [size=32]
 Kernel driver in use: uhci_hcd
 Kernel modules: uhci-hcd

00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 02)
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin B routed to IRQ 19
 Region 4: I/O ports at af80 [size=32]
 Kernel driver in use: uhci_hcd
 Kernel modules: uhci-hcd

00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 02)
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin C routed to IRQ 18
 Region 4: I/O ports at af60 [size=32]
 Kernel driver in use: uhci_hcd
 Kernel modules: uhci-hcd

00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 02)
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin D routed to IRQ 16
 Region 4: I/O ports at af40 [size=32]
 Kernel driver in use: uhci_hcd
 Kernel modules: uhci-hcd

00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02) (prog-if 20)
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin A routed to IRQ 23
 Region 0: Memory at ffd3bc00 (32-bit, non-prefetchable) [size=1K]
 Capabilities: [50] Power Management version 2
  Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 Capabilities: [58] Debug port: BAR=1 offset=00a0
 Kernel driver in use: ehci_hcd
 Kernel modules: ehci-hcd

00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) (prog-if 01)
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Bus: primary=00, secondary=03, subordinate=07, sec-latency=32
 I/O behind bridge: 00001000-00001fff
 Memory behind bridge: ff800000-ff8fffff
 Prefetchable memory behind bridge: 00000000d4000000-00000000d7ffffff
 Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
 BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B-
  PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
 Capabilities: [50] Subsystem: Toshiba America Info Systems Device 0001

00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Capabilities: [e0] Vendor Specific Information <?>
 Kernel modules: iTCO_wdt, intel-rng

00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE Controller (rev 02) (prog-if 80 [Master])
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin B routed to IRQ 19
 Region 0: I/O ports at 01f0 [size=8]
 Region 1: I/O ports at 03f4 [size=1]
 Region 2: I/O ports at 0170 [size=8]
 Region 3: I/O ports at 0374 [size=1]
 Region 4: I/O ports at af10 [size=16]
 Capabilities: [70] Power Management version 2
  Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold-)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 Kernel driver in use: ata_piix
 Kernel modules: ata_piix

01:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controller
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0, Cache Line Size: 64 bytes
 Interrupt: pin A routed to IRQ 221
 Region 0: Memory at ffae0000 (32-bit, non-prefetchable) [size=128K]
 Region 2: I/O ports at bfe0 [size=32]
 Capabilities: [c8] Power Management version 2
  Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  Status: D0 PME-Enable- DSel=0 DScale=1 PME-
 Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable+
  Address: 00000000fee0300c Data: 414a
 Capabilities: [e0] Express (v1) Endpoint, MSI 00
  DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <512ns, L1 <64us
   ExtTag- AttnBtn- AttnInd- PwrInd- RBE- FLReset-
  DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
   RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
   MaxPayload 128 bytes, MaxReadReq 512 bytes
  DevSta: CorrErr- UncorrErr+ FatalErr- UnsuppReq+ AuxPwr+ TransPend-
  LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <128ns, L1 <64us
   ClockPM+ Suprise- LLActRep- BwNot-
  LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
   ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
 Capabilities: [100] Advanced Error Reporting <?>
 Capabilities: [140] Device Serial Number 5a-ce-c7-ff-ff-b7-15-00
 Kernel driver in use: e1000e
 Kernel modules: e1000e

02:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)
 Subsystem: Intel Corporation Device 1040
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0, Cache Line Size: 32 bytes
 Interrupt: pin A routed to IRQ 220
 Region 0: Memory at ff9ff000 (32-bit, non-prefetchable) [size=4K]
 Capabilities: [c8] Power Management version 2
  Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 Capabilities: [d0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable+
  Address: 00000000fee0300c Data: 4152
 Capabilities: [e0] Express (v1) Legacy Endpoint, MSI 00
  DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 unlimited
   ExtTag- AttnBtn- AttnInd- PwrInd- RBE- FLReset-
  DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
   RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
   MaxPayload 128 bytes, MaxReadReq 128 bytes
  DevSta: CorrErr- UncorrErr+ FatalErr- UnsuppReq+ AuxPwr+ TransPend-
  LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <128ns, L1 <64us
   ClockPM+ Suprise- LLActRep- BwNot-
  LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
   ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
  LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
 Capabilities: [100] Advanced Error Reporting <?>
 Capabilities: [140] Device Serial Number 60-ad-06-ff-ff-de-18-00
 Kernel driver in use: iwl3945
 Kernel modules: iwl3945

03:0b.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 168, Cache Line Size: 128 bytes
 Interrupt: pin A routed to IRQ 21
 Region 0: Memory at ff800000 (32-bit, non-prefetchable) [size=4K]
 Bus: primary=03, secondary=04, subordinate=07, sec-latency=176
 Memory window 0: d4000000-d7fff000 (prefetchable)
 Memory window 1: d8000000-dbfff000
 I/O window 0: 00001000-000010ff
 I/O window 1: 00001400-000014ff
 BridgeCtl: Parity- SERR- ISA- VGA- MAbort- >Reset+ 16bInt+ PostWrite+
 16-bit legacy interface ports at 0001
 Kernel driver in use: yenta_cardbus
 Kernel modules: yenta_socket

03:0b.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE 1394 Host Controller (prog-if 10)
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 64 (500ns min, 1000ns max), Cache Line Size: 32 bytes
 Interrupt: pin B routed to IRQ 20
 Region 0: Memory at ff8ff800 (32-bit, non-prefetchable) [size=2K]
 Region 1: Memory at ff8f8000 (32-bit, non-prefetchable) [size=16K]
 Capabilities: [44] Power Management version 2
  Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME+
 Kernel driver in use: ohci1394
 Kernel modules: ohci1394

03:0b.3 SD Host controller: Texas Instruments PCIxx12 SDA Standard Compliant SD Host Controller (prog-if 01)
 Subsystem: Toshiba America Info Systems Device 0001
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 64 (1750ns min, 1000ns max), Cache Line Size: 32 bytes
 Interrupt: pin D routed to IRQ 23
 Region 0: Memory at ff8ff700 (32-bit, non-prefetchable) [size=256]
 Capabilities: [80] Power Management version 2
  Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
  Status: D0 PME-Enable- DSel=0 DScale=0 PME-
 Kernel driver in use: sdhci-pci
 Kernel modules: sdhci-pci

If you guys need more infos and tests, I would like to help.

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Revision history for this message
Jayson Rowe (jayson.rowe) said :
#1

The issue is not with the kernel not recognizing the 4GB of RAM, it's with the Chipset Memory Controller. Although the CPU supports PAE, your chipset does not (called "Enhanced Addressing Modes" by Intel). You can find more info on page 344 of the attached PDF from Intel. (To quote from the doc... Note: The Mobile Intel 943/940GML Express Chipset does not support Enhanced Addressing modes.)

Revision history for this message
Jayson Rowe (jayson.rowe) said :
#2

Thank you for taking the time to report this issue and helping to make Ubuntu better. Examining the information you have given us, this does not appear to be a bug report so we are closing it and converting it to a question in the support tracker. We appreciate the difficulties you are facing, but it would make more sense to raise problems you are having in the support tracker at https://answers.launchpad.net/ubuntu if you are uncertain if they are bugs. For help on reporting bugs, see https://help.ubuntu.com/community/ReportingBugs.

Revision history for this message
Jayson Rowe (jayson.rowe) said :
#3

Also wanted to share the location of the info obtained: http://www.intel.com/Products/Notebook/Chipsets/945PM/945PM-technicaldocuments.htm

The info is in the Datasheet PDF on that page.

Can you help with this problem?

Provide an answer of your own, or ask William Marques for more information if necessary.

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