Indeed, the way to handle it is to parse the EDID, repair it and then
feed it back to the kernel overriding the one provided by your monitor.
Or just get the vendor to supply working firmware.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/1033695
Title:
External HDMI Monitor does not get detected / invalid EDID checksum
Status in “xserver-xorg-video-intel” package in Ubuntu:
Invalid
Bug description:
When connecting a Samsung Syncmaster SA350 series monitor to a Asus
Zenbook UX32VD the monitor does not get detected in the "Displays"
settings screen and spits outs alot of invalid EDID checksum messages
in dmesg.
Message:
[ 5132.677061] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid,
remainder is 155
[ 5132.677069] Raw EDID:
[ 5132.677073] 00 ff ff ff ff ff ff 00 4c 2d d2 07 38 34 30 30
[ 5132.677077] 24 15 01 03 80 30 1b 78 2a 90 c1 a2 59 55 9c 27
[ 5132.677080] 0e 50 54 bf ef 80 71 4f 81 00 81 40 81 80 95 00
[ 5132.677083] 95 0f a9 40 b3 00 02 3a 80 18 71 38 2d 40 58 2c
[ 5132.677086] ff ff ff ff ff ff ff ff 01 1d 00 72 51 d0 1e 20
[ 5132.677089] 6e 28 55 00 dd 0c 11 00 00 1e 00 00 00 fd 00 32
[ 5132.677092] 4b 1f 51 11 00 0a 20 20 20 20 20 20 00 00 00 fc
[ 5132.677094] 00 53 4d 53 32 32 41 33 35 30 48 0a 20 20 01 e1
[ 5132.677103] i915 0000:00:02.0: HDMI-A-1: EDID block 0 invalid.
The monitor does work fine on my other Windows PC
Release:
Description: Ubuntu quantal (development branch)
Release: 12.10
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xserver-xorg-video-intel 2:2.20.2-1ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-8.8-generic 3.5.0
Uname: Linux 3.5.0-8-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.4-0ubuntu6
Architecture: amd64
CompizPlugins:
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Tue Aug 7 00:17:53 2012
DistUpgraded: Fresh install
DistroCodename: quantal
DistroVariant: ubuntu
DkmsStatus:
asus-wmi, 999.01, 3.5.0-8-generic, x86_64: installed
bbswitch, 0.4.2, 3.5.0-4-generic, x86_64: installed
bbswitch, 0.4.2, 3.5.0-6-generic, x86_64: installed
bbswitch, 0.4.2, 3.5.0-8-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes,
GraphicsCard:
Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166]
(rev 09) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Device [1043:1507]
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120627)
MachineType: ASUSTeK COMPUTER INC. UX32VD
ProcEnviron:
TERM=xterm
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-8-generic
root=UUID=9bb3948b-2fd3-46c4-b0bb-0ae32a87278a ro quiet splash pcie_aspm=force
drm.vblankoffdelay=1 i915.semaphores=1 nmi_watchdog=0 vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/29/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX32VD.207
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX32VD
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrUX32VD.207:bd06/29/2012:svnASUSTeKCOMPUTERINC.:pnUX32VD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX32VD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: UX32VD
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
version.compiz: compiz 1:0.9.8+bzr3249-0ubuntu2
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.37-0ubuntu2
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.4-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.4-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.12.99.902-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-2~ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:6.99.99~git20120713.6ef1ad6a-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.2-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.1-4~ubuntu1
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