Bug 49746

Summary: EDID checksum is invalid
Product: xorg Reporter: christoph <spam>
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: git   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
nouveau version, dmesg (Arch, Fedora 17 Beta) none

Description christoph 2012-05-10 10:57:44 UTC 
Created attachment 61378 [details]
nouveau version, dmesg (Arch, Fedora 17 Beta)

Hi.

I am getting EDID checksum errors with my monitor connected to VGA via E-Port Replicator; also the monitor gets wrong resolution (1024x768 instead of 1680x1050) or stays blank. Infrequently the screen shows garbage or the system crashes.

Hardware: Dell Latitude E6400, E-Port Replicator PR01X/02X, Samsung SyncMaster 2243EW (1680x1050), dual-head setup (DP-1 and VGA-1 connected), nVidia Quadro NVS 160M

OS: Arch running Gnome 3.4.1 with all updates (2012-05-10) and xf86-video-nouveau (0.0.16_git20120210-1), Fedora 17 Beta LiveUSB and xorg-x11-drv-nouveau.x86_64 1:0.0.16-34.20110720gitb806e3f.fc17

The setup worked without error some Arch Linux updates ago or with Fedora 16 LiveUSB. Also I happened to have a similar setup at another office with Samsung SyncMaster 203B (1400x1050), also no errors.

Attachment is the dmesg output of Arch Linux and Fedora 17.

Similar info can be found in this forum post:
https://bbs.archlinux.org/viewtopic.php?id=140961

Is it related to the following bug
or nouveau troubleshooting topic?
https://bugs.freedesktop.org/show_bug.cgi?id=31943
http://nouveau.freedesktop.org/wiki/TroubleShooting#Blank_monitor.2C_flicker.2C_snow.2C_or_other_random_live_image_corruption

Thanks in advance. Best regards,

christoph
Comment 2 christoph 2012-06-17 11:09:40 UTC 
Kernel 3.4.2 made it from testing to core in Arch Linux this weekend. The EDID checksum errors are gone, monitor is detected and resolution is fine. Thanks.

christoph

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