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Bug#828087: marked as done (Kernel 4.6 causes X session freezes with Intel NUCs)

Your message dated Tue, 11 May 2021 23:09:29 +0200
with message-id <E1lgZcx-001QMa-Jw@hullmann.westfalen.local>
and subject line Closing this bug
has caused the Debian Bug report #828087,
regarding Kernel 4.6 causes X session freezes with Intel NUCs
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
828087: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=828087
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Package: linux-image-amd64
Version: 4.6+74~bpo8+1
Severity: important

Hi,

I have an Intel Nuc BOXNUC5PPYH Barebone PC and upgraded to kernel 4.6. Since
then I've seen that within the X session I get many freezes, which did not
occur with kernel 4.5. Is there a regression around ?

To reproduce the issue :
DO : start KDM
DO : open a KDE session with graphic effects enabled (like transparency)
EXPECT : the session is usable
ACTUAL : the session freezes while the mouse is still operational

Note :
I can see the following message in the logs :
Jun 24 22:20:06 pccore2duo kernel: [  217.909567]
[drm:intel_check_cpu_fifo_underruns [i915]] *ERROR* pipe A underrun

The computer then becomes frozen under an X session but it can be reached
through SSH.

The issue did not appear with kernel 4.5.x

Workaround :
Add the following parameter to kernel command line :  i915.enable_fbc=0

Rgds

-- System Information:
Debian Release: 8.5
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.6.0-0.bpo.1-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages linux-image-amd64 depends on:
ii  linux-image-4.6.0-0.bpo.1-amd64  4.6.1-1~bpo8+1

linux-image-amd64 recommends no packages.

linux-image-amd64 suggests no packages.

-- no debconf information

--- End Message ---
--- Begin Message --- 
This bug was filed for a very old kernel. If you can reproduce it with
- the current version in unstable/testing
- the latest kernel from buster.backports
please reopen the bug, see https://www.debian.org/Bugs/server-control

--- End Message ---
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