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[Bug 496767] Re: Monitor initially recognized in Ubuntu 9.10, but then reverts to "Unknown Monitor" with 800x600 resolution.

 

Here's the dmesg after an unknown monitor startup:

[    2.108012] pci 0000:00:1d.7: EHCI: BIOS handoff failed (BIOS bug?) 01010001
[    2.108150] pci 0000:01:08.0: Firmware left e100 interrupts enabled; disabling
[    2.108283] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[    2.108318] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[    2.108496] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[    2.108501] ACPI: Power Button [PWRF]
[    2.108580] input: Power Button as /devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input1
[    2.108584] ACPI: Power Button [PWRB]
[    2.108852] processor LNXCPU:00: registered as cooling_device0
[    2.108908] processor LNXCPU:01: registered as cooling_device1
[    2.112101] isapnp: Scanning for PnP cards...
[    2.465828] isapnp: No Plug & Play device found
[    2.467494] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    2.467600] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[    2.467999] 00:07: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[    2.469526] brd: module loaded
[    2.470175] loop: module loaded
[    2.470297] input: Macintosh mouse button emulation as /devices/virtual/input/input2
[    2.470460] ata_piix 0000:00:1f.1: version 2.13
[    2.470475] ata_piix 0000:00:1f.1: enabling device (0005 -> 0007)
[    2.470485]   alloc irq_desc for 18 on node -1
[    2.470489]   alloc kstat_irqs on node -1
[    2.470499] ata_piix 0000:00:1f.1: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[    2.470554] ata_piix 0000:00:1f.1: setting latency timer to 64
[    2.470685] scsi0 : ata_piix
[    2.470826] scsi1 : ata_piix
[    2.472744] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xfc00 irq 14
[    2.472748] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xfc08 irq 15
[    2.474047] Fixed MDIO Bus: probed
[    2.474099] PPP generic driver version 2.4.2
[    2.474255] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    2.474287]   alloc irq_desc for 23 on node -1
[    2.474291]   alloc kstat_irqs on node -1
[    2.474299] ehci_hcd 0000:00:1d.7: PCI INT D -> GSI 23 (level, low) -> IRQ 23
[    2.474319] ehci_hcd 0000:00:1d.7: setting latency timer to 64
[    2.474324] ehci_hcd 0000:00:1d.7: EHCI Host Controller
[    2.474394] ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 1
[    2.478304] ehci_hcd 0000:00:1d.7: debug port 1
[    2.478313] ehci_hcd 0000:00:1d.7: cache line size of 128 is not supported
[    2.478332] ehci_hcd 0000:00:1d.7: irq 23, io mem 0xfe77bc00
[    2.492012] ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00
[    2.492124] usb usb1: configuration #1 chosen from 1 choice
[    2.492170] hub 1-0:1.0: USB hub found
[    2.492181] hub 1-0:1.0: 8 ports detected
[    2.492285] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    2.492314] uhci_hcd: USB Universal Host Controller Interface driver
[    2.492365]   alloc irq_desc for 16 on node -1
[    2.492369]   alloc kstat_irqs on node -1
[    2.492378] uhci_hcd 0000:00:1d.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[    2.492388] uhci_hcd 0000:00:1d.0: setting latency timer to 64
[    2.492393] uhci_hcd 0000:00:1d.0: UHCI Host Controller
[    2.492443] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 2
[    2.492480] uhci_hcd 0000:00:1d.0: irq 16, io base 0x0000ef00
[    2.492587] usb usb2: configuration #1 chosen from 1 choice
[    2.492626] hub 2-0:1.0: USB hub found
[    2.492636] hub 2-0:1.0: 2 ports detected
[    2.492702]   alloc irq_desc for 19 on node -1
[    2.492705]   alloc kstat_irqs on node -1
[    2.492712] uhci_hcd 0000:00:1d.1: PCI INT B -> GSI 19 (level, low) -> IRQ 19
[    2.492720] uhci_hcd 0000:00:1d.1: setting latency timer to 64
[    2.492725] uhci_hcd 0000:00:1d.1: UHCI Host Controller
[    2.492781] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 3
[    2.492811] uhci_hcd 0000:00:1d.1: irq 19, io base 0x0000ef20
[    2.492998] usb usb3: configuration #1 chosen from 1 choice
[    2.493061] hub 3-0:1.0: USB hub found
[    2.493071] hub 3-0:1.0: 2 ports detected
[    2.493138] uhci_hcd 0000:00:1d.2: PCI INT C -> GSI 18 (level, low) -> IRQ 18
[    2.493146] uhci_hcd 0000:00:1d.2: setting latency timer to 64
[    2.493151] uhci_hcd 0000:00:1d.2: UHCI Host Controller
[    2.493196] uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 4
[    2.493228] uhci_hcd 0000:00:1d.2: irq 18, io base 0x0000ef40
[    2.493335] usb usb4: configuration #1 chosen from 1 choice
[    2.493374] hub 4-0:1.0: USB hub found
[    2.493384] hub 4-0:1.0: 2 ports detected
[    2.493448] uhci_hcd 0000:00:1d.3: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[    2.493456] uhci_hcd 0000:00:1d.3: setting latency timer to 64
[    2.493461] uhci_hcd 0000:00:1d.3: UHCI Host Controller
[    2.493505] uhci_hcd 0000:00:1d.3: new USB bus registered, assigned bus number 5
[    2.493529] uhci_hcd 0000:00:1d.3: irq 16, io base 0x0000ef80
[    2.493643] usb usb5: configuration #1 chosen from 1 choice
[    2.493681] hub 5-0:1.0: USB hub found
[    2.493691] hub 5-0:1.0: 2 ports detected
[    2.493833] PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12
[    2.496879] serio: i8042 KBD port at 0x60,0x64 irq 1
[    2.496889] serio: i8042 AUX port at 0x60,0x64 irq 12
[    2.496981] mice: PS/2 mouse device common for all mice
[    2.497118] rtc_cmos 00:02: RTC can wake from S4
[    2.497170] rtc_cmos 00:02: rtc core: registered rtc_cmos as rtc0
[    2.497195] rtc0: alarms up to one month, 114 bytes nvram, hpet irqs
[    2.497362] device-mapper: uevent: version 1.0.3
[    2.497528] device-mapper: ioctl: 4.15.0-ioctl (2009-04-01) initialised: dm-devel@xxxxxxxxxx
[    2.497661] device-mapper: multipath: version 1.1.0 loaded
[    2.497668] device-mapper: multipath round-robin: version 1.0.0 loaded
[    2.497850] EISA: Probing bus 0 at eisa.0
[    2.497892] EISA: Detected 0 cards.
[    2.498052] cpuidle: using governor ladder
[    2.498056] cpuidle: using governor menu
[    2.498843] TCP cubic registered
[    2.499024] NET: Registered protocol family 10
[    2.499696] lo: Disabled Privacy Extensions
[    2.500234] NET: Registered protocol family 17
[    2.500266] Bluetooth: L2CAP ver 2.13
[    2.500269] Bluetooth: L2CAP socket layer initialized
[    2.500274] Bluetooth: SCO (Voice Link) ver 0.6
[    2.500276] Bluetooth: SCO socket layer initialized
[    2.500352] Bluetooth: RFCOMM TTY layer initialized
[    2.500360] Bluetooth: RFCOMM socket layer initialized
[    2.500364] Bluetooth: RFCOMM ver 1.11
[    2.500414] Using IPI No-Shortcut mode
[    2.500518] PM: Resume from disk failed.
[    2.500537] registered taskstats version 1
[    2.500682]   Magic number: 5:850:527
[    2.500769] rtc_cmos 00:02: setting system clock to 2009-12-17 10:30:28 UTC (1261045828)
[    2.500774] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
[    2.500777] EDD information not available.
[    2.517266] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input3
[    2.636626] ata1.00: ATA-7: Maxtor 2F040L0, VAM51JJ0, max UDMA/133
[    2.636630] ata1.00: 80293248 sectors, multi 16: LBA 
[    2.636659] ata1.00: limited to UDMA/33 due to 40-wire cable
[    2.652331] ata1.00: configured for UDMA/33
[    2.652472] scsi 0:0:0:0: Direct-Access     ATA      Maxtor 2F040L0   VAM5 PQ: 0 ANSI: 5
[    2.652697] sd 0:0:0:0: Attached scsi generic sg0 type 0
[    2.652723] sd 0:0:0:0: [sda] 80293248 512-byte logical blocks: (41.1 GB/38.2 GiB)
[    2.652801] sd 0:0:0:0: [sda] Write Protect is off
[    2.652806] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[    2.652842] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    2.653054]  sda:
[    2.660287] ata2.00: ATAPI: SONY    CD-RW  CRX320EE, RYK4, max UDMA/33
[    2.671947]  sda1 sda2 <
[    2.692215] ata2.00: configured for UDMA/33
[    2.694145] scsi 1:0:0:0: CD-ROM            SONY     CD-RW  CRX320EE  RYK4 PQ: 0 ANSI: 5
[    2.700032] sr0: scsi3-mmc drive: 0x/52x writer cd/rw xa/form2 cdda tray
[    2.700037] Uniform CD-ROM driver Revision: 3.20
[    2.700164] sr 1:0:0:0: Attached scsi CD-ROM sr0
[    2.700249] sr 1:0:0:0: Attached scsi generic sg1 type 5
[    2.706275]  sda5 >
[    2.706643] sd 0:0:0:0: [sda] Attached SCSI disk
[    2.706668] Freeing unused kernel memory: 540k freed
[    2.707274] Write protecting the kernel text: 4568k
[    2.707347] Write protecting the kernel read-only data: 1836k
[    2.884486] Linux agpgart interface v0.103
[    2.891068] agpgart-intel 0000:00:00.0: Intel 865 Chipset
[    2.891315] agpgart-intel 0000:00:00.0: detected 8060K stolen memory
[    2.917287] agpgart-intel 0000:00:00.0: AGP aperture is 128M @ 0xf0000000
[    2.932721] Floppy drive(s): fd0 is 1.44M
[    2.994009] e100: Intel(R) PRO/100 Network Driver, 3.5.24-k2-NAPI
[    2.994020] e100: Copyright(c) 1999-2006 Intel Corporation
[    2.994115]   alloc irq_desc for 20 on node -1
[    2.994123]   alloc kstat_irqs on node -1
[    2.994139] e100 0000:01:08.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
[    2.994671] usb 2-1: new low speed USB device using uhci_hcd and address 2
[    3.006695] FDC 0 is a post-1991 82077
[    3.018064] e100 0000:01:08.0: PME# disabled
[    3.082522] e100: eth0: e100_probe: addr 0xfe5ff000, irq 20, MAC addr 00:0e:a6:1e:53:88
[    3.084579] [drm] Initialized drm 1.1.0 20060810
[    3.102375] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[    3.102388] i915 0000:00:02.0: setting latency timer to 64
[    3.178387] usb 2-1: configuration #1 chosen from 1 choice
[    3.217093] usbcore: registered new interface driver hiddev
[    3.236191] [drm:edid_is_valid] *ERROR* Raw EDID:
[    3.236198] <3>00 a0 00 ff ff ff ff 00 10 ac 02 d0 34 33 34 30  ............4340
[    3.236201] <3>25 0c 01 03 68 20 18 78 2e 8a a9 a1 54 46 99 24  %...h .x....TF.$
[    3.236205] <3>0e 48 4c a4 42 00 31 59 45 59 61 59 81 80 71 4f  .HL.B.1YEYaY..qO
[    3.236208] <3>01 01 01 01 01 01 c3 1e 00 20 41 00 20 30 10 60  ......... A. 0.`
[    3.236212] <3>13 00 36 e6 10 00 00 1e 00 00 00 ff 00 36 34 31  ..6..........641
[    3.236215] <3>38 30 32 39 39 30 34 33 34 0a 00 00 00 fc 00 44  802990434......D
[    3.236218] <3>45 4c 4c 20 45 37 37 32 63 0a 20 20 00 00 00 fd  ELL E772c.  ....
[    3.236222] <3>00 32 a0 1e 46 0b 00 0a 20 20 20 20 20 20 00 25  .2..F...      .%
[    3.236225] 
[    3.236229] i915 0000:00:02.0: VGA-1: EDID invalid.
[    3.236235] [drm:drm_helper_initial_config] *ERROR* connectors have no modes, using standard modes
[    3.240309] [drm] fb0: inteldrmfb frame buffer device
[    3.240326] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
[    3.245535] input: Mosart Wireless Mouse as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/input/input4
[    3.245814] generic-usb 0003:062A:6301.0001: input,hiddev96,hidraw0: USB HID v1.10 Mouse [Mosart Wireless Mouse] on usb-0000:00:1d.0-1/input0
[    3.245847] usbcore: registered new interface driver usbhid
[    3.245853] usbhid: v2.6:USB HID core driver
[    3.328101] render error detected, EIR: 0x00000010
[    3.328107] [drm:i915_handle_error] *ERROR* EIR stuck: 0x00000010, masking
[    3.328115] render error detected, EIR: 0x00000010
[    3.334604] [drm] DAC-5: set mode 800x600 8
[    3.336818] Console: switching to colour frame buffer device 100x37
[    3.756750] PM: Starting manual resume from disk
[    3.756756] PM: Resume from partition 8:5
[    3.756759] PM: Checking hibernation image.
[    3.757047] PM: Resume from disk failed.
[    3.784121] EXT4-fs (sda1): barriers enabled
[    3.810308] kjournald2 starting: pid 363, dev sda1:8, commit interval 5 seconds
[    3.810329] EXT4-fs (sda1): delayed allocation enabled
[    3.810335] EXT4-fs: file extents enabled
[    3.815320] EXT4-fs: mballoc enabled
[    3.815342] EXT4-fs (sda1): mounted filesystem with ordered data mode
[    4.807906] type=1505 audit(1261045830.805:2): operation="profile_load" pid=386 name=/usr/share/gdm/guest-session/Xsession
[    4.812490] type=1505 audit(1261045830.811:3): operation="profile_load" pid=387 name=/sbin/dhclient3
[    4.813089] type=1505 audit(1261045830.811:4): operation="profile_load" pid=387 name=/usr/lib/NetworkManager/nm-dhcp-client.action
[    4.813412] type=1505 audit(1261045830.811:5): operation="profile_load" pid=387 name=/usr/lib/connman/scripts/dhclient-script
[    4.911228] type=1505 audit(1261045830.908:6): operation="profile_load" pid=388 name=/usr/bin/evince
[    4.920987] type=1505 audit(1261045830.919:7): operation="profile_load" pid=388 name=/usr/bin/evince-previewer
[    4.926720] type=1505 audit(1261045830.923:8): operation="profile_load" pid=388 name=/usr/bin/evince-thumbnailer
[    4.945361] type=1505 audit(1261045830.943:9): operation="profile_load" pid=390 name=/usr/lib/cups/backend/cups-pdf
[    4.946066] type=1505 audit(1261045830.943:10): operation="profile_load" pid=390 name=/usr/sbin/cupsd
[   15.048274] Adding 1461872k swap on /dev/sda5.  Priority:-1 extents:1 across:1461872k 
[   15.208475] EXT4-fs (sda1): internal journal on sda1:8
[   15.353682] udev: starting version 147
[   16.538273] parport_pc 00:09: reported by Plug and Play ACPI
[   16.538321] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE]
[   16.550549] ppdev: user-space parallel port driver
[   16.694120] lp0: using parport0 (interrupt-driven).
[   16.840992] ip_tables: (C) 2000-2006 Netfilter Core Team
[   16.875304] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[   17.021830] cfg80211: Calling CRDA to update world regulatory domain
[   17.050175] psmouse serio1: ID: 10 00 64
[   17.060578] intel_rng: FWH not detected
[   17.473152] cfg80211: World regulatory domain updated:
[   17.473158] 	(start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[   17.473163] 	(2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   17.473167] 	(2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[   17.473171] 	(2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[   17.473174] 	(5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   17.473178] 	(5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   17.517610]   alloc irq_desc for 22 on node -1
[   17.517617]   alloc kstat_irqs on node -1
[   17.517630] ath5k 0000:01:0b.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
[   17.517708] ath5k 0000:01:0b.0: registered as 'phy0'
[   17.565871] ath: EEPROM regdomain: 0x10
[   17.565876] ath: EEPROM indicates we should expect a direct regpair map
[   17.565880] ath: Country alpha2 being used: CO
[   17.565883] ath: Regpair used: 0x10
[   17.664392] input: ImPS/2 Logitech Wheel Mouse as /devices/platform/i8042/serio1/input/input5
[   17.836720] phy0: Selected rate control algorithm 'minstrel'
[   17.837898] ath5k phy0: Atheros AR5212 chip found (MAC: 0x56, PHY: 0x41)
[   17.837903] ath5k phy0: RF2112B 2GHz radio found (0x46)
[   17.838574] cfg80211: Calling CRDA for country: CO
[   17.843048] cfg80211: Regulatory domain changed to country: CO
[   17.843056] 	(start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[   17.843063] 	(2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[   17.843069] 	(5170000 KHz - 5250000 KHz @ 20000 KHz), (300 mBi, 1700 mBm)
[   17.843074] 	(5250000 KHz - 5330000 KHz @ 20000 KHz), (300 mBi, 2300 mBm)
[   17.843080] 	(5735000 KHz - 5835000 KHz @ 20000 KHz), (300 mBi, 3000 mBm)
[   18.510795] ADDRCONF(NETDEV_UP): eth0: link is not ready
[   18.577174] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   18.703500]   alloc irq_desc for 17 on node -1
[   18.703506]   alloc kstat_irqs on node -1
[   18.703515] Intel ICH 0000:00:1f.5: PCI INT B -> GSI 17 (level, low) -> IRQ 17
[   18.703556] Intel ICH 0000:00:1f.5: setting latency timer to 64
[   19.128023] intel8x0_measure_ac97_clock: measured 54851 usecs (2643 samples)
[   19.128028] intel8x0: clocking to 48000
[   19.149042] __ratelimit: 3 callbacks suppressed
[   19.149047] type=1505 audit(1261045845.147:12): operation="profile_replace" pid=863 name=/usr/share/gdm/guest-session/Xsession
[   19.151558] type=1505 audit(1261045845.147:13): operation="profile_replace" pid=864 name=/sbin/dhclient3
[   19.152169] type=1505 audit(1261045845.151:14): operation="profile_replace" pid=864 name=/usr/lib/NetworkManager/nm-dhcp-client.action
[   19.152497] type=1505 audit(1261045845.151:15): operation="profile_replace" pid=864 name=/usr/lib/connman/scripts/dhclient-script
[   19.159413] type=1505 audit(1261045845.155:16): operation="profile_replace" pid=865 name=/usr/bin/evince
[   19.169897] type=1505 audit(1261045845.167:17): operation="profile_replace" pid=865 name=/usr/bin/evince-previewer
[   19.175888] type=1505 audit(1261045845.171:18): operation="profile_replace" pid=865 name=/usr/bin/evince-thumbnailer
[   19.186571] type=1505 audit(1261045845.183:19): operation="profile_replace" pid=867 name=/usr/lib/cups/backend/cups-pdf
[   19.187272] type=1505 audit(1261045845.183:20): operation="profile_replace" pid=867 name=/usr/sbin/cupsd
[   19.191147] type=1505 audit(1261045845.187:21): operation="profile_replace" pid=868 name=/usr/sbin/tcpdump
[   21.639738] [drm:edid_is_valid] *ERROR* Raw EDID:
[   21.639748] <3>00 a0 00 ff ff ff ff 00 10 ac 02 d0 34 33 34 30  ............4340
[   21.639753] <3>25 0c 01 03 68 20 18 78 2e 8a a9 a1 54 46 99 24  %...h .x....TF.$
[   21.639757] <3>0e 48 4c a4 42 00 31 59 45 59 61 59 81 80 71 4f  .HL.B.1YEYaY..qO
[   21.639762] <3>01 01 01 01 01 01 c3 1e 00 20 41 00 20 30 10 60  ......... A. 0.`
[   21.639766] <3>13 00 36 e6 10 00 00 1e 00 00 00 ff 00 36 34 31  ..6..........641
[   21.639771] <3>38 30 32 39 39 30 34 33 34 0a 00 00 00 fc 00 44  802990434......D
[   21.639775] <3>45 4c 4c 20 45 37 37 32 63 0a 20 20 00 00 00 fd  ELL E772c.  ....
[   21.639780] <3>00 32 a0 1e 46 0b 00 0a 20 20 20 20 20 20 00 25  .2..F...      .%
[   21.639783] 
[   21.639788] i915 0000:00:02.0: VGA-1: EDID invalid.
[   21.745677] [drm:edid_is_valid] *ERROR* Raw EDID:
[   21.745687] <3>00 a0 00 ff ff ff ff 00 10 ac 02 d0 34 33 34 30  ............4340
[   21.745691] <3>25 0c 01 03 68 20 18 78 2e 8a a9 a1 54 46 99 24  %...h .x....TF.$
[   21.745696] <3>0e 48 4c a4 42 00 31 59 45 59 61 59 81 80 71 4f  .HL.B.1YEYaY..qO
[   21.745700] <3>01 01 01 01 01 01 c3 1e 00 20 41 00 20 30 10 60  ......... A. 0.`
[   21.745705] <3>13 00 36 e6 10 00 00 1e 00 00 00 ff 00 36 34 31  ..6..........641
[   21.745709] <3>38 30 32 39 39 30 34 33 34 0a 00 00 00 fc 00 44  802990434......D
[   21.745713] <3>45 4c 4c 20 45 37 37 32 63 0a 20 20 00 00 00 fd  ELL E772c.  ....
[   21.745718] <3>00 32 a0 1e 46 0b 00 0a 20 20 20 20 20 20 00 25  .2..F...      .%
[   21.745721] 
[   21.745727] i915 0000:00:02.0: VGA-1: EDID invalid.
[   24.625518] CPU0 attaching NULL sched-domain.
[   24.625529] CPU1 attaching NULL sched-domain.
[   24.648169] CPU0 attaching sched-domain:
[   24.648178]  domain 0: span 0-1 level SIBLING
[   24.648185]   groups: 0 1
[   24.648195]   domain 1: span 0-1 level MC
[   24.648201]    groups: 0-1 (__cpu_power = 2048)
[   24.648213] CPU1 attaching sched-domain:
[   24.648218]  domain 0: span 0-1 level SIBLING
[   24.648224]   groups: 1 0
[   24.648233]   domain 1: span 0-1 level MC
[   24.648239]    groups: 0-1 (__cpu_power = 2048)
[   24.756861] CPU0 attaching NULL sched-domain.
[   24.756871] CPU1 attaching NULL sched-domain.
[   24.769091] CPU0 attaching sched-domain:
[   24.769097]  domain 0: span 0-1 level SIBLING
[   24.769102]   groups: 0 1
[   24.769111] CPU1 attaching sched-domain:
[   24.769114]  domain 0: span 0-1 level SIBLING
[   24.769118]   groups: 1 0
[   25.544232] [drm:edid_is_valid] *ERROR* Raw EDID:
[   25.544241] <3>00 a0 00 ff ff ff ff 00 10 ac 02 d0 34 33 34 30  ............4340
[   25.544245] <3>25 0c 01 03 68 20 18 78 2e 8a a9 a1 54 46 99 24  %...h .x....TF.$
[   25.544248] <3>0e 48 4c a4 42 00 31 59 45 59 61 59 81 80 71 4f  .HL.B.1YEYaY..qO
[   25.544252] <3>01 01 01 01 01 01 c3 1e 00 20 41 00 20 30 10 60  ......... A. 0.`
[   25.544255] <3>13 00 36 e6 10 00 00 1e 00 00 00 ff 00 36 34 31  ..6..........641
[   25.544259] <3>38 30 32 39 39 30 34 33 34 0a 00 00 00 fc 00 44  802990434......D
[   25.544262] <3>45 4c 4c 20 45 37 37 32 63 0a 20 20 00 00 00 fd  ELL E772c.  ....
[   25.544266] <3>00 32 a0 1e 46 0b 00 0a 20 20 20 20 20 20 00 25  .2..F...      .%
[   25.544268] 
[   25.544273] i915 0000:00:02.0: VGA-1: EDID invalid.
[   25.653374] [drm:edid_is_valid] *ERROR* Raw EDID:
[   25.653383] <3>00 a0 00 ff ff ff ff 00 10 ac 02 d0 34 33 34 30  ............4340
[   25.653386] <3>25 0c 01 03 68 20 18 78 2e 8a a9 a1 54 46 99 24  %...h .x....TF.$
[   25.653390] <3>0e 48 4c a4 42 00 31 59 45 59 61 59 81 80 71 4f  .HL.B.1YEYaY..qO
[   25.653393] <3>01 01 01 01 01 01 c3 1e 00 20 41 00 20 30 10 60  ......... A. 0.`
[   25.653397] <3>13 00 36 e6 10 00 00 1e 00 00 00 ff 00 36 34 31  ..6..........641
[   25.653400] <3>38 30 32 39 39 30 34 33 34 0a 00 00 00 fc 00 44  802990434......D
[   25.653404] <3>45 4c 4c 20 45 37 37 32 63 0a 20 20 00 00 00 fd  ELL E772c.  ....
[   25.653407] <3>00 32 a0 1e 46 0b 00 0a 20 20 20 20 20 20 00 25  .2..F...      .%
[   25.653410] 
[   25.653415] i915 0000:00:02.0: VGA-1: EDID invalid.
[   25.775652] [drm:edid_is_valid] *ERROR* Raw EDID:
[   25.775660] <3>00 a0 00 ff ff ff ff 00 10 ac 02 d0 34 33 34 30  ............4340
[   25.775664] <3>25 0c 01 03 68 20 18 78 2e 8a a9 a1 54 46 99 24  %...h .x....TF.$
[   25.775667] <3>0e 48 4c a4 42 00 31 59 45 59 61 59 81 80 71 4f  .HL.B.1YEYaY..qO
[   25.775671] <3>01 01 01 01 01 01 c3 1e 00 20 41 00 20 30 10 60  ......... A. 0.`
[   25.775674] <3>13 00 36 e6 10 00 00 1e 00 00 00 ff 00 36 34 31  ..6..........641
[   25.775678] <3>38 30 32 39 39 30 34 33 34 0a 00 00 00 fc 00 44  802990434......D
[   25.775681] <3>45 4c 4c 20 45 37 37 32 63 0a 20 20 00 00 00 fd  ELL E772c.  ....
[   25.775684] <3>00 32 a0 1e 46 0b 00 0a 20 20 20 20 20 20 00 25  .2..F...      .%
[   25.775687] 
[   25.775692] i915 0000:00:02.0: VGA-1: EDID invalid.
[   40.483092] [drm:edid_is_valid] *ERROR* Raw EDID:
[   40.483101] <3>00 a0 00 ff ff ff ff 00 10 ac 02 d0 34 33 34 30  ............4340
[   40.483104] <3>25 0c 01 03 68 20 18 78 2e 8a a9 a1 54 46 99 24  %...h .x....TF.$
[   40.483108] <3>0e 48 4c a4 42 00 31 59 45 59 61 59 81 80 71 4f  .HL.B.1YEYaY..qO
[   40.483111] <3>01 01 01 01 01 01 c3 1e 00 20 41 00 20 30 10 60  ......... A. 0.`
[   40.483115] <3>13 00 36 e6 10 00 00 1e 00 00 00 ff 00 36 34 31  ..6..........641
[   40.483118] <3>38 30 32 39 39 30 34 33 34 0a 00 00 00 fc 00 44  802990434......D
[   40.483122] <3>45 4c 4c 20 45 37 37 32 63 0a 20 20 00 00 00 fd  ELL E772c.  ....
[   40.483125] <3>00 32 a0 1e 46 0b 00 0a 20 20 20 20 20 20 00 25  .2..F...      .%
[   40.483128] 
[   40.483133] i915 0000:00:02.0: VGA-1: EDID invalid.
[   40.610338] [drm:edid_is_valid] *ERROR* Raw EDID:
[   40.610349] <3>00 a0 00 ff ff ff ff 00 10 ac 02 d0 34 33 34 30  ............4340
[   40.610354] <3>25 0c 01 03 68 20 18 78 2e 8a a9 a1 54 46 99 24  %...h .x....TF.$
[   40.610358] <3>0e 48 4c a4 42 00 31 59 45 59 61 59 81 80 71 4f  .HL.B.1YEYaY..qO
[   40.610363] <3>01 01 01 01 01 01 c3 1e 00 20 41 00 20 30 10 60  ......... A. 0.`
[   40.610367] <3>13 00 36 e6 10 00 00 1e 00 00 00 ff 00 36 34 31  ..6..........641
[   40.610371] <3>38 30 32 39 39 30 34 33 34 0a 00 00 00 fc 00 44  802990434......D
[   40.610376] <3>45 4c 4c 20 45 37 37 32 63 0a 20 20 00 00 00 fd  ELL E772c.  ....
[   40.610380] <3>00 32 a0 1e 46 0b 00 0a 20 20 20 20 20 20 00 25  .2..F...      .%
[   40.610384] 
[   40.610389] i915 0000:00:02.0: VGA-1: EDID invalid.
[   40.723831] [drm:edid_is_valid] *ERROR* Raw EDID:
[   40.723840] <3>00 a0 00 ff ff ff ff 00 10 ac 02 d0 34 33 34 30  ............4340
[   40.723845] <3>25 0c 01 03 68 20 18 78 2e 8a a9 a1 54 46 99 24  %...h .x....TF.$
[   40.723849] <3>0e 48 4c a4 42 00 31 59 45 59 61 59 81 80 71 4f  .HL.B.1YEYaY..qO
[   40.723854] <3>01 01 01 01 01 01 c3 1e 00 20 41 00 20 30 10 60  ......... A. 0.`
[   40.723858] <3>13 00 36 e6 10 00 00 1e 00 00 00 ff 00 36 34 31  ..6..........641
[   40.723863] <3>38 30 32 39 39 30 34 33 34 0a 00 00 00 fc 00 44  802990434......D
[   40.723867] <3>45 4c 4c 20 45 37 37 32 63 0a 20 20 00 00 00 fd  ELL E772c.  ....
[   40.723871] <3>00 32 a0 1e 46 0b 00 0a 20 20 20 20 20 20 00 25  .2..F...      .%
[   40.723875] 
[   40.723880] i915 0000:00:02.0: VGA-1: EDID invalid.
[   42.750977] [drm:edid_is_valid] *ERROR* Raw EDID:
[   42.750985] <3>00 a0 00 ff ff ff ff 00 10 ac 02 d0 34 33 34 30  ............4340
[   42.750989] <3>25 0c 01 03 68 20 18 78 2e 8a a9 a1 54 46 99 24  %...h .x....TF.$
[   42.750993] <3>0e 48 4c a4 42 00 31 59 45 59 61 59 81 80 71 4f  .HL.B.1YEYaY..qO
[   42.750996] <3>01 01 01 01 01 01 c3 1e 00 20 41 00 20 30 10 60  ......... A. 0.`
[   42.750999] <3>13 00 36 e6 10 00 00 1e 00 00 00 ff 00 36 34 31  ..6..........641
[   42.751003] <3>38 30 32 39 39 30 34 33 34 0a 00 00 00 fc 00 44  802990434......D
[   42.751006] <3>45 4c 4c 20 45 37 37 32 63 0a 20 20 00 00 00 fd  ELL E772c.  ....
[   42.751010] <3>00 32 a0 1e 46 0b 00 0a 20 20 20 20 20 20 00 25  .2..F...      .%
[   42.751013] 
[   42.751016] i915 0000:00:02.0: VGA-1: EDID invalid.

-- 
Monitor initially recognized in Ubuntu 9.10, but then reverts to "Unknown Monitor" with 800x600 resolution.
https://bugs.launchpad.net/bugs/496767
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which is subscribed to xserver-xorg-video-intel in ubuntu.



References