RE: Please attach the output of `lspci -vvnn`, and attach your
/var/log/Xorg.0.log file from after reproducing this issue. If you've
made any customizations to your /etc/X11/xorg.conf please attach that as
well.

gl...@glennvaio:~$ lspci -vvnn
00:00.0 Host bridge [0600]: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML 
and 945GT Express Memory Controller Hub [8086:27a0] (rev 03)
        Subsystem: Sony Corporation Device [104d:8212]
        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: <access denied>
        Kernel driver in use: agpgart-intel
        Kernel modules: intel-agp

00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 
943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
        Subsystem: Sony Corporation Device [104d:8212]
        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 dc100000 (32-bit, non-prefetchable) [size=512K]
        Region 1: I/O ports at 1800 [size=8]
        Region 2: Memory at c0000000 (32-bit, prefetchable) [size=256M]
        Region 3: Memory at dc200000 (32-bit, non-prefetchable) [size=256K]
        Capabilities: <access denied>
        Kernel modules: intelfb

00:02.1 Display controller [0380]: Intel Corporation Mobile 945GM/GMS/GME, 
943/940GML Express Integrated Graphics Controller [8086:27a6] (rev 03)
        Subsystem: Sony Corporation Device [104d:8212]
        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 dc180000 (32-bit, non-prefetchable) [size=512K]
        Capabilities: <access denied>

00:1b.0 Audio device [0403]: Intel Corporation 82801G (ICH7 Family) High 
Definition Audio Controller [8086:27d8] (rev 02)
        Subsystem: Sony Corporation Device [104d:8212]
        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 22
        Region 0: Memory at dc240000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: HDA Intel
        Kernel modules: snd-hda-intel

00:1c.0 PCI bridge [0604]: Intel Corporation 82801G (ICH7 Family) PCI Express 
Port 1 [8086:27d0] (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: 64 bytes
        Bus: primary=00, secondary=02, subordinate=03, sec-latency=0
        I/O behind bridge: 00002000-00002fff
        Memory behind bridge: d6000000-d7ffffff
        Prefetchable memory behind bridge: 00000000d0000000-00000000d1ffffff
        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: <access denied>
        Kernel driver in use: pcieport-driver
        Kernel modules: shpchp

00:1c.1 PCI bridge [0604]: Intel Corporation 82801G (ICH7 Family) PCI Express 
Port 2 [8086:27d2] (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: 64 bytes
        Bus: primary=00, secondary=04, subordinate=05, sec-latency=0
        I/O behind bridge: 00003000-00003fff
        Memory behind bridge: d8000000-d9ffffff
        Prefetchable memory behind bridge: 00000000d2000000-00000000d3ffffff
        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: <access denied>
        Kernel driver in use: pcieport-driver
        Kernel modules: shpchp

00:1c.2 PCI bridge [0604]: Intel Corporation 82801G (ICH7 Family) PCI Express 
Port 3 [8086:27d4] (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: 64 bytes
        Bus: primary=00, secondary=06, subordinate=07, sec-latency=0
        I/O behind bridge: 00004000-00004fff
        Memory behind bridge: da000000-dbffffff
        Prefetchable memory behind bridge: 00000000d4000000-00000000d5ffffff
        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: <access denied>
        Kernel driver in use: pcieport-driver
        Kernel modules: shpchp

00:1d.0 USB Controller [0c03]: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #1 [8086:27c8] (rev 02)
        Subsystem: Sony Corporation Device [104d:8212]
        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 1820 [size=32]
        Kernel driver in use: uhci_hcd
        Kernel modules: uhci-hcd

00:1d.1 USB Controller [0c03]: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #2 [8086:27c9] (rev 02)
        Subsystem: Sony Corporation Device [104d:8212]
        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 17
        Region 4: I/O ports at 1840 [size=32]
        Kernel driver in use: uhci_hcd
        Kernel modules: uhci-hcd

00:1d.2 USB Controller [0c03]: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #3 [8086:27ca] (rev 02)
        Subsystem: Sony Corporation Device [104d:8212]
        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 1860 [size=32]
        Kernel driver in use: uhci_hcd
        Kernel modules: uhci-hcd

00:1d.7 USB Controller [0c03]: Intel Corporation 82801G (ICH7 Family) USB2 EHCI 
Controller [8086:27cc] (rev 02) (prog-if 20)
        Subsystem: Sony Corporation Device [104d:8212]
        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 dc444000 (32-bit, non-prefetchable) [size=1K]
        Capabilities: <access denied>
        Kernel driver in use: ehci_hcd
        Kernel modules: ehci-hcd

00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge 
[8086:2448] (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=08, subordinate=0c, sec-latency=32
        I/O behind bridge: 00005000-00005fff
        Memory behind bridge: dc000000-dc0fffff
        Prefetchable memory behind bridge: 0000000088000000-000000008bffffff
        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: <access denied>

00:1f.0 ISA bridge [0601]: Intel Corporation 82801GBM (ICH7-M) LPC Interface 
Bridge [8086:27b9] (rev 02)
        Subsystem: Sony Corporation Device [104d:8212]
        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: <access denied>
        Kernel modules: intel-rng, iTCO_wdt

00:1f.1 IDE interface [0101]: Intel Corporation 82801G (ICH7 Family) IDE 
Controller [8086:27df] (rev 02) (prog-if 8a [Master SecP PriP])
        Subsystem: Sony Corporation Device [104d:8212]
        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 18
        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 1810 [size=16]
        Kernel driver in use: ata_piix
        Kernel modules: ata_piix

00:1f.2 IDE interface [0101]: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA 
IDE Controller [8086:27c4] (rev 02) (prog-if 8f [Master SecP SecO PriP PriO])
        Subsystem: Sony Corporation Device [104d:8212]
        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 18b0 [size=8]
        Region 1: I/O ports at 18a4 [size=4]
        Region 2: I/O ports at 18a8 [size=8]
        Region 3: I/O ports at 18a0 [size=4]
        Region 4: I/O ports at 1890 [size=16]
        Region 5: Memory at dc444400 (32-bit, non-prefetchable) [size=1K]
        Capabilities: <access denied>
        Kernel driver in use: ata_piix
        Kernel modules: ata_piix

00:1f.3 SMBus [0c05]: Intel Corporation 82801G (ICH7 Family) SMBus Controller 
[8086:27da] (rev 02)
        Subsystem: Sony Corporation Device [104d:8212]
        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-
        Interrupt: pin B routed to IRQ 10
        Region 4: I/O ports at 18c0 [size=32]
        Kernel modules: i2c-i801

02:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8036 PCI-E 
Fast Ethernet Controller [11ab:4351] (rev 16)
        Subsystem: Sony Corporation Device [104d:8212]
        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 220
        Region 0: Memory at d6000000 (64-bit, non-prefetchable) [size=16K]
        Region 2: I/O ports at 2000 [size=256]
        Capabilities: <access denied>
        Kernel driver in use: sky2
        Kernel modules: sky2

06:00.0 Ethernet controller [0200]: Atheros Communications Inc. AR242x 
802.11abg Wireless PCI Express Adapter [168c:001c] (rev 01)
        Subsystem: AMBIT Microsystem Corp. Device [1468:0423]
        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 18
        Region 0: Memory at da000000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: <access denied>
        Kernel driver in use: ath_pci
        Kernel modules: ath_pci

08:03.0 CardBus bridge [0607]: Texas Instruments PCIxx12 Cardbus Controller 
[104c:8039]
        Subsystem: Sony Corporation Device [104d:8212]
        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 16
        Region 0: Memory at dc006000 (32-bit, non-prefetchable) [size=4K]
        Bus: primary=08, secondary=09, subordinate=0c, sec-latency=176
        Memory window 0: 88000000-8bfff000 (prefetchable)
        Memory window 1: 8c000000-8ffff000
        I/O window 0: 00005000-000050ff
        I/O window 1: 00005400-000054ff
        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

08:03.1 FireWire (IEEE 1394) [0c00]: Texas Instruments PCIxx12 OHCI Compliant 
IEEE 1394 Host Controller [104c:803a] (prog-if 10)
        Subsystem: Sony Corporation Device [104d:8212]
        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 (750ns min, 1000ns max)
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at dc005000 (32-bit, non-prefetchable) [size=2K]
        Region 1: Memory at dc000000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: ohci1394
        Kernel modules: ohci1394

08:03.2 Mass storage controller [0180]: Texas Instruments 5-in-1 Multimedia 
Card Reader (SD/MMC/MS/MS PRO/xD) [104c:803b]
        Subsystem: Sony Corporation Device [104d:8212]
        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)
        Interrupt: pin C routed to IRQ 18
        Region 0: Memory at dc004000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: <access denied>
        Kernel driver in use: tifm_7xx1
        Kernel modules: tifm_7xx1


Thank you very much.  I'm sorry that I didn't see your question last month.  I 
thought it would email me.
One further point: This happens either exclusively or almost exclusively when 
my Vaio is unplugged & on battery.
Best, Glenn



** Attachment added: "Xorg.0.log"
   http://launchpadlibrarian.net/25225145/Xorg.0.log

-- 
Repeating arrow keys change to numbers.  Not num lock.
https://bugs.launchpad.net/bugs/337025
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