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Black Screen on Ubuntu 18.04 + Intel Graphics with Kernel > 4.15.0-47

Submitted by Richard Zowalla

Assigned to Intel GFX Bugs mailing list

Link to original bug (#111495)

Description

Created attachment 145174
dmesg output for v5.3-rc6 mainline kernel

Hi,

we've been running 18.04 (w/ Xubuntu) + 4.15.0-47 kernel for a while now (on Minix Z83-4 devices w/ Intel X5-Z8350 CPUs), which is working fine. I had opened an issue at Ubuntu, but was told to report this upstream (reference: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1840889)

After upgrading the kernel to a newer version (> 4.15.0-47), HDMI output is not available anymore, i915 reports an invalid EDID version via dmesg I dropped the full dmesg output on Pastebin: https://pastebin.com/jXTqAzkQ (with 4.15.0-58-generic). Attachment contains dmesg output of mainline kernel v5.3-rc6

As a start I'm blaming the Linux kernel / i915 since booting 4.15.0-47 kernel works just fine.

Known faulty kernel versions are:

  • Ubuntu Kernel: 4.15.0-58-generic
  • Ubuntu Kernel: 4.15.0-59-generic
  • Ubuntu Kernel: 5.0.0-25-generic
  • Mainline Kernel: v5.3-rc6

Not sure how to best collect logs and system information for you since I'm not used to debugging black screens. However, SSH access is possible. I am happy to provide more information, if needed. We can also install and test experimental kernel versions.

Note: This happens then attached via a standard HDMI cable as well as with a HDMI-DVI cable on different monitor setups.

**Attachment 145174**, "dmesg output for v5.3-rc6 mainline kernel":
dmesg-mainline-5.3-rc6.txt
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