Bug 892302
| Summary: | kms radeon DisplayPort gives no signal error in X but works in console | ||||||||||
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| Product: | [Fedora] Fedora | Reporter: | Juha Heljoranta <juha.heljoranta> | ||||||||
| Component: | xorg-x11-drv-ati | Assignee: | X/OpenGL Maintenance List <xgl-maint> | ||||||||
| Status: | CLOSED WONTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||||
| Severity: | unspecified | Docs Contact: | |||||||||
| Priority: | unspecified | ||||||||||
| Version: | 17 | CC: | gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, xgl-maint | ||||||||
| Target Milestone: | --- | ||||||||||
| Target Release: | --- | ||||||||||
| Hardware: | Unspecified | ||||||||||
| OS: | Unspecified | ||||||||||
| Whiteboard: | |||||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||||
| Doc Text: | Story Points: | --- | |||||||||
| Clone Of: | Environment: | ||||||||||
| Last Closed: | 2013-08-01 14:53:28 UTC | Type: | Bug | ||||||||
| Regression: | --- | Mount Type: | --- | ||||||||
| Documentation: | --- | CRM: | |||||||||
| Verified Versions: | Category: | --- | |||||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||||
| Embargoed: | |||||||||||
| Attachments: |
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Created attachment 673349 [details]
dmesg output when DP works correctly (step 10)
Created attachment 673350 [details]
DisplayPort-0 section output from xrandr --verbose
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Created attachment 673348 [details] dmesg output when no signal (step 6) Description of problem: Monitor DP connection fails to detect signal in X but works in console. Curiously precondition for this bug is that there is an other device connected to the same monitor via DVI. Version-Release number of selected component (if applicable): kernel-3.6.11-1.fc17.x86_64 xorg-x11-server-Xorg-1.12.4-2.fc17.x86_64 Steps to Reproduce: 1. Connect monitor DP to laptop 1. Connect monitor DVI to other computer 2. Power on all devices and login to standard fedora graphical session 3. From laptop toggle output to all monitors (tap twice fn-f4) 4. Verify that xrandr shows monitor DP with status "connected" 5. Select DisplayPort from monitor 6. Wait few seconds and monitor says "no signal" (BUG) 7. Verify that xrandr still shows monitor DP with status "connected" 8. Switch to console (ctrl-alt-f2) 9. Select DisplayPort from monitor 10. Wait few seconds and monitor hows the same console as LVDS (SUCCESS) 11. Switch back to X (ctrl-alt-f1) 10. Wait few seconds and monitor now hows the X session (SUCCESS) So the bug is in step 6. rest of the steps provide a workaround. Actual results: DP connection fails to work in X if there is DVI connection to monitor (but works in console). Expected results: DP connection should work in X. Additional info: # lspci -nn | grep VGA 01:00.0 VGA compatible controller [0300]: ATI Technologies Inc NI Seymour [AMD Radeon HD 6470M] [1002:6760] Monitor model: ASUS PB278Q Attaching dmesg output (drm.debug=0xe) from steps 6 and 11 plus relevant output from xrandr.