[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2016-01-23 Thread Christopher M. Penalver 
** Tags removed: kernel-bug-exists-upstream
** Tags added: cherry-pick kernel-fixed-upstream reverse-bisect-done

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  Kernel disabling serial port ttyS0 again

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2016-01-22 Thread Hans109h 
e0f03e87fc6f27a8af9896f430f2945b3b1664c0 is the first bad commit
commit e0f03e87fc6f27a8af9896f430f2945b3b1664c0
Author: Heiner Kallweit 
Date:   Wed Dec 16 07:33:22 2015 +0100

PNP: respect PNP_DRIVER_RES_DO_NOT_CHANGE when detaching

I have a device (Nuvoton 6779D Super-IO IR RC with nuvoton-cir driver)
which works after initial boot but not any longer if I unload and
re-load the driver module.

Digging into the issue I found that unloading the driver calls
pnp_disable_dev although the driver has flag PNP_DRIVER_RES_DO_NOT_CHANGE
set. IMHO this is not right.

Let's have a look at the call chain when probing a device:
pnp_device_probe
1. attaches the device
2. if it's not active and PNP_DRIVER_RES_DO_NOT_CHANGE is not set
   it gets activated
3. probes driver

I think pnp_device_remove should do it in reverse order and also
respect PNP_DRIVER_RES_DO_NOT_CHANGE. Therefore:
1. call drivers remove callback
2. if device is active and PNP_DRIVER_RES_DO_NOT_CHANGE is not set
   disable it
3. detach device

The change works for me and sounds logical to me.
However I don't know the pnp driver in detail so I might be wrong.

Signed-off-by: Heiner Kallweit 
Signed-off-by: Rafael J. Wysocki 

:04 04 8b208d9346c4a3948dbf8cde3083cc9c8adb026d
2f91a8f9fcf0699cc5d8ea3bc4322d8f1724e67b M  drivers

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Title:
  Kernel disabling serial port ttyS0 again

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2016-01-20 Thread Hans109h 
fix after afd2ff9b7e1b367172f18ba7f693dfb62bdcb2dc

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Title:
  Kernel disabling serial port ttyS0 again

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2016-01-20 Thread Hans109h 
A recent commit has fixed this problem upstream.  I need to bisect
still, just keeping some notes here.

Fixed prior to commit 5807fcaa9bf7dd87241df739161c119cf78a6bc4 but after
v4.4.0

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  Kernel disabling serial port ttyS0 again

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2015-10-30 Thread Christopher M. Penalver 
Hans109h, the issue you are reporting is an upstream one. Could you
please report this problem following the instructions verbatim at
https://wiki.ubuntu.com/Bugs/Upstream/kernel to the appropriate venue
(Rafael J. Wysocki, Len Brown, Thomas Gleixner, Jiang Liu, and Rafael J.
Wysocki, CC linux-acpi)?

Please provide a direct URL to your newly made report when it becomes
available so that it may be tracked.

Thank you for your understanding.

** Tags removed: kernel-bug-exists-upstream-4.3-rc6
** Tags added: kernel-bug-exists-upstream-4.3-rc7

** Changed in: linux (Ubuntu)
   Status: Confirmed => Triaged

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2015-10-29 Thread Hans109h 
c420dbd13ef7f399a865498496ac9ce2755b8007 is the first bad commit
commit c420dbd13ef7f399a865498496ac9ce2755b8007
Author: Thomas Gleixner 
Date:   Mon Feb 2 10:42:48 2015 +0800

ACPI: Implement proper length checks for mem resources

Check whether the resulting length is the same as the given
length. Check for start <= end as well.

We need to hand in the resource for this, so we can apply the flags
directly.

[Jiang] Remove enforcement that resource starting address must be
non-zero.

Signed-off-by: Thomas Gleixner 
Signed-off-by: Jiang Liu 
Signed-off-by: Rafael J. Wysocki 

:04 04 8cb7699fc3d3b9498cd76d13a2f5edd1b40e6c40
6602fafdd7d25b91781ce211a01e6c73a22585c4 M  drivers

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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  Kernel disabling serial port ttyS0 again

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2015-10-29 Thread Christopher M. Penalver 
Hans109h, any change with the latest mainline kernel (4.3-rc7)?

** Tags removed: needs-bisect
** Tags added: bisect-done

** Changed in: linux (Ubuntu)
   Status: Confirmed => Incomplete

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2015-10-29 Thread Hans109h 
No change, v4.3-rc7 is bad.

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2015-10-25 Thread Christopher M. Penalver 
Hans109h, thank you for reporting this and helping make Ubuntu better.

Could you please test the latest mainline kernel (4.3-rc7) and advise to
the results?

** Tags added: kernel-bug-exists-upstream kernel-bug-exists-
upstream-4.3-rc6 latest-bios-2104 regression-update

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
   Status: Confirmed => Incomplete

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2015-10-25 Thread Hans109h 
Adjacent kernel versions:

Good: 3.19.0-22.22
Bad: 4.0.0-1.1

Working on commit bisect.

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2015-10-25 Thread Christopher M. Penalver 
Hans109h, the next step is to fully commit bisect from kernel 3.16 to
4.2 in order to identify the last good kernel commit, followed
immediately by the first bad one. This will allow for a more expedited
analysis of the root cause of your issue. Could you please do this
following https://wiki.ubuntu.com/Kernel/KernelBisection ?

Please note, finding adjacent kernel versions is not fully commit
bisecting.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

** Tags added: needs-bisect

** Description changed:

- Same problem as
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1313981.  Given the
- time and kernel development that has occurred since I reported that bug,
- I thought i would start a new bug report.
- 
- Upon upgrading to Ubuntu Gnome 15.10 with kernel 4.2 I am once again
- unable to access my serial port.
- 
- I have tested the mainline kernel, v4.3-rc6-unstable and the bug is
- still present.
+ Upon upgrading from 14.10 to Ubuntu Gnome 15.10 with kernel 4.2 I am
+ once again unable to access my serial port.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-16-generic 4.2.0-16.19
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.19.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/pcmC1D0c', 
'/dev/snd/controlC1', '/dev/snd/by-path', '/dev/snd/hwC0D3', '/dev/snd/hwC0D0', 
'/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D2c', 
'/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', 
'/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Sat Oct 24 22:50:11 2015
  HibernationDevice: RESUME=UUID=61ccfbf9-f4d0-4989-8d82-be0dd1500450
  InstallationDate: Installed on 2014-11-30 (328 days ago)
  InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Release amd64 
(20141022.1)
  MachineType: System manufacturer System Product Name
  ProcEnviron:
-  TERM=xterm-256color
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  TERM=xterm-256color
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic 
root=UUID=e0e80586-764e-42bf-8659-c5da430f1d1e ro crashkernel=384M-:128M 
crashkernel=384M-:128M crashkernel=384M-:128M crashkernel=384M-:128M 
crashkernel=384M-:128M crashkernel=384M-:128M
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
-  linux-restricted-modules-4.2.0-16-generic N/A
-  linux-backports-modules-4.2.0-16-generic  N/A
-  linux-firmware1.149
+  linux-restricted-modules-4.2.0-16-generic N/A
+  linux-backports-modules-4.2.0-16-generic  N/A
+  linux-firmware1.149
  RfKill:
-  0: phy0: Wireless LAN
-   Soft blocked: yes
-   Hard blocked: no
+  0: phy0: Wireless LAN
+   Soft blocked: yes
+   Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to wily on 2015-10-24 (0 days ago)
  dmi.bios.date: 08/13/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2104
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P8Z77-V
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr2104:bd08/13/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8Z77-V:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

** Changed in: linux (Ubuntu)
   Status: Confirmed => Incomplete

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Title:
  Kernel disabling serial port ttyS0 again

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[Bug 1509751] Re: Kernel disabling serial port ttyS0 again

2015-10-25 Thread Hans109h 
I have tested the mainline kernel, v4.3-rc6-unstable and the bug is
still present.

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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  Kernel disabling serial port ttyS0 again

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