Red Hat Bugzilla – Bug 825441
Fedora 16 does not detect DVI->DisplayPort connection
Last modified: 2013-02-13 07:51:05 EST
Created attachment 587006 [details]
Attachment includes dmesg, /var/log/messages, /var/log/Xorg.0.log
Description of problem:
When I plug in my KVM using a DVI to DisplayPort adapter, the system does not detect the DisplayPort connection. I've rebooted a few times and checked the BIOS for any settings that could be disabling it.
xrandr does not detect the external monitor connected via DisplayPort
Monitor will activate if I boot into Windows, so it's not a hardware/BIOS issue.
Version-Release number of selected component (if applicable):
How reproducible: Cannot not reproduce :)
Steps to Reproduce:
1. Boot Fedora (live CD or installed)
2. Monitor connected to DisplayPort does not turn on
1. External monitor connected to DisplayPort does not turn on
2. Running xrandr does not show DisplayPort registered
3. Searching through Xorg.0.log does not reveal DisplayPort being detected
1. Monitor connected to DisplayPort turns on and is configured as second monitor
2. Run xrandr and notice DisplayPort not registered
3. Xorg.0.log shows DisplayPort connection
- Computer = Alienware m15x with Nvidia GeForce GTX 260M
- External Monitor = Dell UltraSharp 2408WFP,Wide Flat Panel
Same problem as user above but on Fedora 17 32 bit.
- Dell Latitude E6420 with Docking station
removed laptop from docking station and used hdmi port but same results
Bug was marked as "NeedInfo" but no request for what type of information was given. Willing to provide additional information as necessary.
I also think I'm seeing the same thing with an existing F16 install. The monitor is active as the BIOS and grub console but once the kernel starts doing modesetting, it goes into sleep mode and never comes back.
This is a regression under recent F16 kernel updates. Xorg starts and detects the card, but according to xrandr, there is no monitor connected to my NV98 card, even though the DisplayPort->DVI connection hasn't changed.
Rebooting to the older kernel-3.2.10-3.fc16.x86_64 makes everything work, so the bug must actually be in the nvidia-specific kernel side of things rather than in xorg-x11-drv-nouveau, which doesn't change when I switch kernels. I have a radeon-based card in the system as well, and it continues to work with all kernel versions I have installed.
I tested with kernel-3.4.4-3.fc16.x86_64 from updates-testing and the problem remains. kernel-3.2.10-3.fc16.x86_64 is still the last kernel where my nouveau display port->dvi primary display is detected and stays awake after boot.
Hi, I am not certain my bug is really the same after looking at the attachments more carefully, so I've submitted another bug report https://bugzilla.redhat.com/show_bug.cgi?id=839865
Sorry for any confusion...
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