Bug 1382867 - Kernel crashes when power cycling MST monitor on Thinkpad T450s, HD Graphics 5500 [8086:1616]
Summary: Kernel crashes when power cycling MST monitor on Thinkpad T450s, HD Graphics ...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: xorg-x11-drv-intel
Version: 7.3
Hardware: x86_64
OS: Linux
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Lyude
QA Contact: Desktop QE
URL:
Whiteboard:
Depends On:
Blocks: 1394840
TreeView+ depends on / blocked
 
Reported: 2016-10-07 23:05 UTC by Vasiliy Sharapov
Modified: 2017-08-08 12:44 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2017-08-08 12:44:51 UTC
Target Upstream Version:

Attachments (Terms of Use)
vmcore-dmesg.txt (60.71 KB, text/plain)
2016-10-07 23:05 UTC, Vasiliy Sharapov 		no flags Details
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Description Vasiliy Sharapov 2016-10-07 23:05:44 UTC 
Created attachment 1208277 [details]
vmcore-dmesg.txt

Description of problem:
Kernel crashes when an MST-capable monitor plugged into the T450s's mini-DP port is power cycled.

Version-Release number of selected component (if applicable):
RHEL-7.3-20160929.5
xorg-x11-server-Xorg-1.17.2-22.el7.x86_64
xorg-x11-drv-intel-2.99.917-22.20151206.el7.x86_64
kernel-3.10.0-511.el7.x86_64
linux-firmware-20160830-49.git7534e19.el7.noarch
package mesa is not installed
mesa-dri-drivers-11.2.2-2.20160614.el7.x86_64
package xorg-x11-glamor is not installed


How reproducible:
100%

Steps to Reproduce:
1. Power on a T450s with a Dell P2415Q MST-capable display plugged in.
(There doesn't need to be a display daisy-chained via MST)
2. Try hotplugging the mini-DP port on the T450s, there should be no crashes 
3. Try power cycling the MST display either via the power button or the display's power cord

Actual results:
kernel crashes

Expected results:
same effect as hotplugging the display

Additional info:
Comment 7 Vasiliy Sharapov 2017-08-08 12:09:02 UTC 
No more crash in:
RHEL-7.4-20170727.n.0
xorg-x11-server-Xorg-1.19.3-11.el7.x86_64
xorg-x11-drv-ati-7.7.1-3.20160928git3fc839ff.el7.x86_64
kernel-3.10.0-693.el7.x86_64
linux-firmware-20170606-56.gitc990aae.el7.noarch
mesa-dri-drivers-17.0.1-6.20170307.el7.x86_64
libdrm-2.4.74-1.el7.x86_64
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