| Summary: | [BDW-Y dp-to-hdmi] DP display not light after entering the kernel on 4K monitor. | ||||||||||||||||||||||
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| Product: | DRI | Reporter: | liulei <lei.a.liu> | ||||||||||||||||||||
| Component: | DRM/Intel | Assignee: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||||||||||||||
| Status: | CLOSED FIXED | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||||||||||||||
| Severity: | major | ||||||||||||||||||||||
| Priority: | high | CC: | intel-gfx-bugs | ||||||||||||||||||||
| Version: | unspecified | ||||||||||||||||||||||
| Hardware: | Other | ||||||||||||||||||||||
| OS: | All | ||||||||||||||||||||||
| Whiteboard: | |||||||||||||||||||||||
| i915 platform: | i915 features: | ||||||||||||||||||||||
| Attachments: |
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First, does this work on any Intel platform? There should be no difference here vs. Haswell. Can you please give me more details about the DP->HDMI adapter. We do not currently support HDMI 2.0 which is required for 4k@60FPS. Please also provide output from `xrandr --verbose` (via ssh) if possible. Created attachment 100428 [details]
information of bdwy `xrandr` and `xrandr --verbose`
Created attachment 100429 [details]
dmesg of bdwy
Created attachment 100430 [details]
information of hsw `xrandr` and `xrandr --verbose`
Created attachment 100431 [details]
dmesg of hsw
(In reply to comment #1) > First, does this work on any Intel platform? There should be no difference > here vs. Haswell. > Haswell can light up 4K monitor with the same DP->HDMI adapter and the same kernel. > Can you please give me more details about the DP->HDMI adapter. > > We do not currently support HDMI 2.0 which is required for 4k@60FPS. Please > also provide output from `xrandr --verbose` (via ssh) if possible. I attach the information of output Latest -nightly still fails to light up DP monitor. Created attachment 106932 [details] [review] patch 1/2 Created attachment 106933 [details] [review] patch 2/2 Do these 2 patches applied together help? The machine related to this bug was dead. I tried to reproduce this bug on our new BDW-Y machine, but find DP unable to light up both on 4K monitor and normal monitor. See Bug 85048. I tested it on latest -nightly kernel(1e61c9), the pathchs are inclued in the kernel. Hi, Now that Bug 85048 is closed, would you mind re-testing this and attach a full dmesg from boot with drm.debug=7? Thanks, If it still fails could you try the same thing with i915.enable_ips=0 ? -- Damien Created attachment 110482 [details]
dmesg log
Created attachment 110483 [details]
dmesg log with i915.enable_ips=0
It works on normal monitor, but still fails on 4K monitor.
Do you get a pic on screen if you set a smaller resolution? (In reply to Jani Nikula from comment #16) > Do you get a pic on screen if you set a smaller resolution? How can I set a smaller resolution? Would you please teach me a method to do this? See xrandr --mode option. The 4K monitor is successfully lighted up whit 3840x2160 mode. So close this bug. Closing old verified. |
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Created attachment 100148 [details] dmesg ==System Environment== -------------------------- Regression: No. Non-working platforms: BDW-Y ==kernel== -------------------------- origin/drm-intel-nightly: 9f53d4f6f55aa0c037f299dbe2986eec9151be9b(fails) drm-intel-nightly: 2014y-05m-28d-00h-00m-47s integration manifest origin/drm-intel-next-queued: 38d811545c61cf188beac860615a08fb32f73eb1(fails) drm/i915/vlv: add pll assertion when disabling DPIO common well origin/drm-intel-fixes: d23db88c3ab233daed18709e3a24d6c95344117f(fails) drm/i915: Prevent negative relocation deltas from wrapping ==Bug detailed description== ----------------------------- Booting with DP->HDMI ,4K monitor can't be lighted up after entering the kernel. But normal monitor can be lighted up successfully, and original Ubuntu Kernel can light up 4K monitor. ==Reproduce steps== ---------------------------- Boot with DP->HDMI 4k monitor.