[Bug 451126] [NEW] Connecting extermal display blanks screen

[Saku Ytti]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

http://www.intel.com/design/mobile/datashts/309219.htm
1.3.2.1 LVDS Interface
         • Dual-channels LVDS interface support: 2 x 18 bpp panel support up to QXGA
           (2048 x 1536)
1.8.5 LVDS Interface
       • 25 MHz –112 MHz single channel; @18 bpp
       • Panel support up to XGA (1024 x 768) internal and SXGA (1280 x 1024) external


00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Contro
ller (rev 03)
	Subsystem: Hewlett-Packard Company Device 30aa
	Flags: bus master, fast devsel, latency 0, IRQ 16
	Memory at e8400000 (32-bit, non-prefetchable) [size=512K]
	I/O ports at 6000 [size=8]
	Memory at d0000000 (32-bit, prefetchable) [size=256M]
	Memory at e8480000 (32-bit, non-prefetchable) [size=256K]
	Capabilities: [90] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable-
	Capabilities: [d0] Power Management version 2
	Kernel driver in use: i915
	Kernel modules: i915


I'm running native 1400x1050 on main display, when I connect to external display
it is set to 800x600 and both displays are blank.
If I manually set main display to 1152x864 then both displays work.

I believe this is expected with said hardware. Maybe Ubuntu should guarantee
that combined resolution will not exceed hardware limits?

ProblemType: Bug
Architecture: amd64
Date: Wed Oct 14 12:33:34 2009
DistroRelease: Ubuntu 9.10
MachineType: Hewlett-Packard HP Compaq nc6320 (EV073AV)
Package: xserver-xorg-video-intel 2:2.9.0-1ubuntu2
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-14-generic root=UUID=6f302a41-c2a8-4320-b1e1-fe945726f677 ro crashkernel=384M-2G:64M,2G-:128M quiet splash
ProcVersionSignature: Ubuntu 2.6.31-14.46-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu5
 libgl1-mesa-glx 7.6.0-1ubuntu4
 libdrm2 2.4.14-1ubuntu1
 xserver-xorg-video-intel 2:2.9.0-1ubuntu2
 xserver-xorg-video-ati 1:6.12.99+git20090825.fc74e119-0ubuntu3
SourcePackage: xserver-xorg-video-intel
Uname: Linux 2.6.31-14-generic x86_64
dmi.bios.date: 12/15/2006
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68YDU Ver. F.0B
dmi.board.name: 30AA
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 58.12
dmi.chassis.asset.tag: HUB7140H0S
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68YDUVer.F.0B:bd12/15/2006:svnHewlett-Packard:pnHPCompaqnc6320(EV073AV):pvrF.0B:rvnHewlett-Packard:rn30AA:rvrKBCVersion58.12:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP Compaq nc6320 (EV073AV)
dmi.product.version: F.0B
dmi.sys.vendor: Hewlett-Packard
fglrx: Not loaded
system:
 distro:             Ubuntu
 architecture:       x86_64kernel:             2.6.31-14-generic

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug

-- 
Connecting extermal display blanks screen
https://bugs.launchpad.net/bugs/451126
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