[Bug 1542939] Re: system freeze after vt switching

** Tags added: cscc -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To manage notifications about this bug go to:

[Bug 1542939] Re: system freeze after vt switching

This has *just* had a fix committed upstream and is hoped to be available in v5.0. Could we get it backported to the LTS kernels? commit ed20151a7699bb2c77eba3610199789a126940c4 Author: Ville Syrjälä Date: Tue Nov 27 20:20:04 2018 +0200 drm/vblank: Allow dynamic per-crtc max_vblank_count

[Bug 1542939] Re: system freeze after vt switching

Launchpad has imported 9 comments from the remote bug at https://bugzilla.redhat.com/show_bug.cgi?id=1313323. If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at

[Bug 1542939] Re: system freeze after vt switching

Giorgio Vazzana (mywing), given the fix released didn't address your issue, then this report has nothing to do with your problem. If you would like your issue addressed, it will help immensely if you filed a new report with the Ubuntu repository kernel (not mainline/upstream) via a terminal:

[Bug 1542939] Re: system freeze after vt switching

Hello, I see that the problem is still present on Ubuntu 16.04 x86_64 on my Thinkpad T420. Can anybody confirm that? Also, what's the easiest workaround at the moment? Thanks. holden@lynx:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description:Ubuntu 16.04.1 LTS

[Bug 1542939] Re: system freeze after vt switching

This bug was fixed in the package linux-lts-xenial - 4.4.0-24.43~14.04.1 --- linux-lts-xenial (4.4.0-24.43~14.04.1) trusty; urgency=low [ Kamal Mostafa ] * CVE-2016-1583 (LP: #1588871) - ecryptfs: fix handling of directory opening - SAUCE: proc: prevent stacking

[Bug 1542939] Re: system freeze after vt switching

This bug was fixed in the package linux-lts-xenial - 4.4.0-24.43~14.04.1 --- linux-lts-xenial (4.4.0-24.43~14.04.1) trusty; urgency=low [ Kamal Mostafa ] * CVE-2016-1583 (LP: #1588871) - ecryptfs: fix handling of directory opening - SAUCE: proc: prevent stacking

[Bug 1542939] Re: system freeze after vt switching

This bug was fixed in the package linux - 4.4.0-24.43 --- linux (4.4.0-24.43) xenial; urgency=low [ Kamal Mostafa ] * CVE-2016-1583 (LP: #1588871) - ecryptfs: fix handling of directory opening - SAUCE: proc: prevent stacking filesystems on top - SAUCE: ecryptfs:

[Bug 1542939] Re: system freeze after vt switching

This bug was fixed in the package linux - 4.4.0-23.41 --- linux (4.4.0-23.41) xenial; urgency=low [ Kamal Mostafa ] * Release Tracking Bug - LP: #1582431 * zfs: disable module checks for zfs when cross-compiling (LP: #1581127) - [Packaging] disable zfs module checks

[Bug 1542939] Re: system freeze after vt switching

** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To manage

[Bug 1542939] Re: system freeze after vt switching

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- xenial' to 'verification-done-xenial'. If verification is not done by 5 working days from

[Bug 1542939] Re: system freeze after vt switching

** Changed in: linux (Ubuntu Xenial) Importance: Undecided => Medium ** Changed in: linux-lts-xenial (Ubuntu Xenial) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 1542939] Re: system freeze after vt switching

In comment #33, commit 4cd3991 is superfluous. I have verified that the bug can be fixed on my hardware by applying a single cherry-pick to the xenial (Ubuntu-4.4.0-22.39) kernel, git am 0001-drm-atomic-Remove-drm_atomic_connectors_for_crtc.patch # 14de6c4 backported to xenial Thanks to the

[Bug 1542939] Re: system freeze after vt switching

** Changed in: linux-lts-xenial (Ubuntu Xenial) Status: New => Fix Committed ** Changed in: linux-lts-xenial (Ubuntu Xenial) Status: Fix Committed => In Progress ** Changed in: linux (Ubuntu Xenial) Status: In Progress => Fix Committed -- You received this bug notification

[Bug 1542939] Re: system freeze after vt switching

** Also affects: linux (Ubuntu Xenial) Importance: Undecided Status: New ** Also affects: linux-lts-xenial (Ubuntu Xenial) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Xenial) Status: New => In Progress -- You received this bug notification because

[Bug 1542939] Re: system freeze after vt switching

** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To manage notifications about this bug go to:

[Bug 1542939] Re: system freeze after vt switching

Applying the following two cherry-picks to the xenial (Ubuntu-4.4.0-22.39) kernel solves the bug for my hardware, git cherry-pick 4cd3991 git am 0001-drm-atomic-Remove-drm_atomic_connectors_for_crtc.patch # 14de6c4 does not apply cleanly, so use the attached patch [For the mainline (v4.4.9)

[Bug 1542939] Re: system freeze after vt switching

A reverse-bisect (as per comment #8) shows that the first good commit is: commit 14de6c44d149c68df1800ded42bbab51485ef67a Author: Maarten Lankhorst drm/atomic: Remove drm_atomic_connectors_for_crtc. ** Tags removed: needs-reverse-bisect ** Tags added:

[Bug 1542939] Re: system freeze after vt switching

** Tags removed: patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To manage notifications about this bug go to:

[Bug 1542939] Re: system freeze after vt switching

This bug affects the 4.4 kernel, including the xenial kernel and the lts-xenial kernel in trusty. The linked freedesktop bug report mentions that the bug was fixed in the 4.5 kernel with the following commit,

[Bug 1542939] Re: system freeze after vt switching

stinger, could you please advise to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1542939/comments/8 ? ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 1542939] Re: system freeze after vt switching

** Changed in: linux-lts-xenial (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To manage notifications

[Bug 1542939] Re: system freeze after vt switching

** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To manage notifications about this bug go to:

[Bug 1542939] Re: system freeze after vt switching

For some reason the link in #27 isn't registered as a patch, so I'll re- submit the patch in the hope that the bots notice it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system

[Bug 1542939] Re: system freeze after vt switching

** Attachment added: "drm/i915: Calculate watermark related members in the crtc_state, v4." https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1542939/+attachment/4639342/+files/patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to

[Bug 1542939] Re: system freeze after vt switching

** Also affects: linux-lts-xenial (Ubuntu) Importance: Undecided Status: New ** Changed in: linux-lts-xenial (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 1542939] Re: system freeze after vt switching

http://kernel.ubuntu.com/git/ubuntu/linux.git/commit/?id=92826fcdfc147a7d16766e987c12a9dfe1860c3f -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To

[Bug 1542939] Re: system freeze after vt switching

author Maarten Lankhorst 2015-12-03 12:49:13 (GMT) committer Maarten Lankhorst 2015-12-07 09:56:08 (GMT) commit 92826fcdfc147a7d16766e987c12a9dfe1860c3f (patch) tree5d5f93ea48390b6f51328461f31d46c196b4b0c9

[Bug 1542939] Re: system freeze after vt switching

This bug affects the 4.4 kernel, including the xenial kernel and the lts-xenial kernel in trusty. As described in the freedesktop bug report, the bug was fixed in the 4.5 kernel with the following commit,

[Bug 1542939] Re: system freeze after vt switching

Launchpad has imported 7 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=93509. If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at

[Bug 1542939] Re: system freeze after vt switching

And https://bugzilla.redhat.com/show_bug.cgi?id=1313323 ** Also affects: linux via https://bugs.freedesktop.org/show_bug.cgi?id=93509 Importance: Unknown Status: Unknown ** Also affects: fedora via https://bugzilla.redhat.com/show_bug.cgi?id=1313323 Importance: Unknown

[Bug 1542939] Re: system freeze after vt switching

Anther report confirming on x220: https://lists.freedesktop.org/archives /intel-gfx/2016-January/084198.html ** Bug watch added: Red Hat Bugzilla #1313323 https://bugzilla.redhat.com/show_bug.cgi?id=1313323 -- You received this bug notification because you are a member of Ubuntu Bugs, which

[Bug 1542939] Re: system freeze after vt switching

This is affecting an increasing set of users; for instance, it seems to be the underlying problem in bug 1545238. My Thinkpad X220 is also showing the same problem, which suggests multiple Intel graphics systems may be affected. See upstream bugs: https://bugzilla.kernel.org/show_bug.cgi?id=92171

[Bug 1542939] Re: system freeze after vt switching

Actually, this upstream bug is more likely to be related: https://bugs.freedesktop.org/show_bug.cgi?id=93509 -- this includes a tentative bisect indicating the commit. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 1542939] Re: system freeze after vt switching

Hi Christopher, Thank your for the quick reply, here you go: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1562618 Let me know if you need more info. Kind regards, Vincent -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 1542939] Re: system freeze after vt switching

try it often, you will see the freeze iam now on Ubuntu 4.4.0-16.32-generic 4.4.6 this is the problem on linux 4.4 linux-4.4.0/drivers/gpu/drm/drm_irq.c:1268 drm_wait_one_vblank+0x1b5/0x1c0 [drm] see my CurrentDmesg.txt -- You received this bug notification because you are a member of

[Bug 1542939] Re: system freeze after vt switching

Vincent Gerris, it will help immensely if you filed a new report with the Ubuntu repository kernel (not mainline/upstream) via a terminal: ubuntu-bug linux Please feel free to subscribe me to it. For more on why this is helpful, please see https://wiki.ubuntu.com/ReportingBugs. -- You

[Bug 1542939] Re: system freeze after vt switching

I have random freezes on: Linux vincent-Lenovo-Yoga-2-11 4.4.0-15-generic #31-Ubuntu SMP Fri Mar 18 19:08:31 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux I can switch VT without problems, but I have had lockups now for 5 times. I hope this "stable" version will have that fixed before the kernel

[Bug 1542939] Re: system freeze after vt switching

sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date [sudo] Passwort für stinger: P53E.210 06/22/2012 no improvement, same crash Feb 11 08:45:21 serona kernel: [ 286.815504] [ cut here ] Feb 11 08:45:21 serona kernel: [ 286.815541] WARNING: CPU: 1 PID:

[Bug 1542939] Re: system freeze after vt switching

Christopher, the latest mainline kernel from /~kernel- ppa/mainline/v4.5-rc3-wily fix the VT switching issue. stinger@serona:~$ uname -a Linux serona 4.5.0-040500rc3-generic #201602071930 SMP Mon Feb 8 00:34:43 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux ** Changed in: linux (Ubuntu)

[Bug 1542939] Re: system freeze after vt switching

** Tags added: kernel-fixed-upstream kernel-fixed-upstream-4.5-rc3 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To manage notifications about this

[Bug 1542939] Re: system freeze after vt switching

v4.4-wily: freeze v4.4.1-wily: freeze v4.5-rc1-wily: no freeze <<< v4.5-rc2-wily: no freeze v4.5-rc3-wily: no freeze ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to

[Bug 1542939] Re: system freeze after vt switching

** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To manage notifications about

[Bug 1542939] Re: system freeze after vt switching

Oh, wait only the freeze is fixed. Some kernel errors left Feb 11 21:43:34 serona kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun Feb 11 21:43:34 serona kernel: [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on

[Bug 1542939] Re: system freeze after vt switching

stinger, to advise, the scope of this report is only the freeze (not line items containing the word error). Despite this, the next step is to fully reverse commit bisect from kernel 4.4 to 4.5-rc3 in order to identify the last bad commit, followed immediately by the first good one. Once this good

[Bug 1542939] Re: system freeze after vt switching

stinger, in order to allow additional upstream developers to examine the issue, at your earliest convenience, could you please test the latest upstream kernel available from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D ? Please keep in mind the following: 1) The one to test is at the

[Bug 1542939] Re: system freeze after vt switching

stinger, thank you for reporting this and helping make Ubuntu better. As per https://www.asus.com/Commercial- Notebooks/ASUSPRO_ESSENTIAL_P53E/HelpDesk_Download/ an update to your computer's buggy and outdated BIOS is available (210). If you update to this following

[Bug 1542939] Re: system freeze after vt switching

** Changed in: linux (Ubuntu) Importance: Undecided => Critical -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To manage notifications about this