** Tags added: cscc
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Title:
[drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting for DDI
BUF C idle bit
To manage notifications about
I've updated the kernel to v4.20:
Linux citadel 4.20.0-042000-generic #201812232030 SMP Mon Dec 24 01:32:58 UTC
2018 x86_64 x86_64 x86_64 GNU/Linux
So far I've got no problem with docking and undocking. OS recognizes
both monitors with no problem.
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I'm currently running latest Ubuntu version and it didn't happen to me for
quite some time now:
Linux ZALANDO-27144 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC
2018 x86_64 x86_64 x86_64 GNU/Linux
I can't recall with which update it went away, sorry.
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Does this still happen to latest mainline kernel v4.20-rc7?
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https://bugs.launchpad.net/bugs/1777863
Title:
[drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting for DDI
BUF C
Linux kernel: 4.18.0-11.12
Still not fixed.
Logs attached. (journalctl.log)
** Attachment added: "journalctl.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1777863/+attachment/5212964/+files/journalctl.log
** Changed in: linux (Ubuntu)
Status: Incomplete => New
** Tags
I have this exact same issue. I have connected two displays (RGB and
HDMI cables) I've updated from Ubuntu 18.04 to 18.10. Everything was
working correctly in 18.04.
Steps to reproduce:
Case 1:
1. Start docked laptop with displays connected in the docking station
2. Undock laptop
3. Redock laptop
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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Update, mainline kernel 4.17.3-041703-generic is also affected, only
less frequent.
Jul 02 07:58:20 mymachine kernel: microcode: microcode updated early to
revision 0x84, date = 2018-01-21
Jul 02 07:58:20 mymachine kernel: Linux version 4.17.3-041703-generic
(kernel@tangerine) (gcc version
I currently run on mainline 4.17.3-041703-generic #201806252030 SMP Tue
Jun 26 00:33:17 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux and it didn't
occur again. With the 4.15.0-23 I had up to 4 spontaneous reboots an
office day.
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That doesn't seem to happen with 4.15.0-22-generic.
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https://bugs.launchpad.net/bugs/1777863
Title:
[drm:intel_wait_ddi_buf_idle [i915]] *ERROR* Timeout waiting for DDI
BUF C idle
Did this issue start happening after an update/upgrade? Was there a
prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.17
The lspci -vnvn output.
** Attachment added: "The lspci -vnvn output."
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1777863/+attachment/5154644/+files/lspci-vnvn.log
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