"drm timed out" with driver i915 + Intel Mobile GM965/GL960 Integrated Graphics with Kernel 4.15

Bug #1767808 reported by Vivien GUEANT on 2018-04-29
14
This bug affects 2 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Medium
Unassigned

Bug Description

With Ubuntu 18.04 + Kernel 4.15, at boot time there are many periods when the boot freezes before the timeout of 10 seconds with Intel Mobile GM965/GL960 Integrated Graphics (driver i915).
In total it is 198 seconds that are lost in these timeouts during boot, more than 3 minutes!

Regression is present since linux kernel 4.8 (with Ubuntu 16.04).

To fix, explicitly disable the port with an i915 module setting with video=SVIDEO-1:d in the kernel command line parameter in the bootloader.
1/ sudo gedit /etc/default/grub
2/ add "video=SVIDEO-1:d" to "GRUB_CMDLINE_LINUX_DEFAULT" line
3/ sudo update-grub

After applying this, the system boots up much faster, there are no "drm ... timed out" messages.

Vivien GUEANT (vivienfr) on 2018-04-29
description: updated
description: updated
Joseph Salisbury (jsalisbury) wrote :

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.16 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.17-rc3

Changed in linux (Ubuntu):
importance: Undecided → Medium
status: New → Incomplete

@jsalisbury It is definitely not fixed upstream. See https://bugs.freedesktop.org/show_bug.cgi?id=93782

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