I've backported this commit:
commit e404ba8d06ff2a1bdb916a9e5d2c09cacd7e5ca3
Author: Ville Syrjälä <[email protected]>
Date: Mon Aug 17 18:46:20 2015 +0300
drm/i915: Setup DDI clk for MST on SKL
Set up the DDI->PLL mapping on SKL also for MST links. Might help make
MST operational on SKL.
v2: Rebased due to KBL
Improve the patch subject, Jesse provided the new one
Cc: Maarten Lankhorst <[email protected]>
Signed-off-by: Ville Syrjälä <[email protected]>
Link:
http://patchwork.freedesktop.org/patch/msgid/[email protected]
References: https://bugs.freedesktop.org/show_bug.cgi?id=91791
Reviewed-by: Jesse Barnes <[email protected]>
for our i915_bpo driver, and it has been tested to fix the hang.
** Changed in: linux (Ubuntu Vivid)
Importance: Undecided => High
** Changed in: linux (Ubuntu Vivid)
Status: New => In Progress
** Changed in: linux (Ubuntu Vivid)
Assignee: (unassigned) => Timo Aaltonen (tjaalton)
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https://bugs.launchpad.net/bugs/1515169
Title:
[i915_bpo][SKL-U] System hangs when VGA monitor plugged in
Status in linux package in Ubuntu:
New
Status in linux source package in Vivid:
In Progress
Status in linux source package in Wily:
New
Status in linux source package in Xenial:
New
Bug description:
A system being certified hangs hard when a VGA monitor is plugged in.
The machine has a built-in DP MST bridge, but the driver has no
support for MST. Upstream recently added a patch to add support for
it, and it improves the situation that there's no hang anymore.
Monitor still stays blank but that'll need another SRU once a patch
for it is available.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1515169/+subscriptions
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