[Bug 1382909] Re: Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

2014-10-26 Thread Christopher M. Penalver
** Tags removed: needs-reverse-bisect
** Tags added: cherry-pick reverse-bisect-done

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

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  Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

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[Bug 1382909] Re: Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

2014-10-24 Thread md_5
Sorry Chris,

Fix CommittedFixed, but not available until next release. made it
sound like the upstream commit had been made and would fix the issue
once 3.18 was merged in 15.04.

With regards to the bisect I can say with certainty it is one of these:
https://lkml.org/lkml/2014/10/6/515

Is there any merit to me narrowing down a more specific commit? Would a
patch be backported, or should I just wait for 15.04?

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  Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

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[Bug 1382909] Re: Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

2014-10-24 Thread Christopher M. Penalver
md_5, if you would like a backport to a current release, then the
specific commit would need to be identified and tested on your hardware.
Once testing verifies it fixes the issue, then it would be considered
for a backport. Otherwise, you would wait until whichever release
contains a fix for your issue.

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  Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

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[Bug 1382909] Re: Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

2014-10-24 Thread md_5
The following commit resolves this issue:
https://github.com/torvalds/linux/commit/0b8db271f1592e118feef7300f6da85bea9366da

It applies cleanly to 3.17.1, backported from 3.18RC1.

Thanks

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

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  Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

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[Bug 1382909] Re: Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

2014-10-23 Thread md_5
I am genuinely surprised. Despite 3.17 having worse issues (bugged display 
dimming as well), 3.18 RC1 appears to work fine without any paramaters at all:
Linux XPS-15Z 3.18.0-031800rc1-generic #201410192135 SMP Mon Oct 20 01:37:04 
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

Looking forward to 15.04 I guess :)

** Changed in: linux (Ubuntu)
   Status: Incomplete = Fix Committed

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  Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

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[Bug 1382909] Re: Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

2014-10-23 Thread Christopher M. Penalver
md_5, this is not Fix Committed as outlined in
https://wiki.ubuntu.com/Bugs/Status .

Despite this, the next step is to fully reverse commit bisect the linux
kernel in order to identify the fix commit. Could you please do this
following
https://wiki.ubuntu.com/Kernel/KernelBisection#How_do_I_reverse_bisect_the_upstream_kernel.3F
?

Once the commit has been identified, then please mark this Status
Confirmed.

** Changed in: linux (Ubuntu)
   Status: Fix Committed = Incomplete

** Tags added: kernel-fixed-upstream kernel-fixed-upstream-3.18-rc1
needs-reverse-bisect

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Title:
  Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

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[Bug 1382909] Re: Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

2014-10-22 Thread Christopher M. Penalver
** Description changed:

- Filed at Chris P's request, this bug is still present on both the Ubuntu
- 14.04 kernel (3.13) as well as the latest mainline kernel (3.17). In
- addition the mainline kernel causes additional issues with regards to
- brightness control.
+ This bug is still present on both the Ubuntu 14.04 kernel (3.13) as well
+ as the latest mainline kernel (3.17). In addition the mainline kernel
+ causes additional issues with regards to brightness control.
  
- I have used the boot param noapic to run Ubuntu on this laptop since
- 12.04, however acpi=off, acpi=noirq or acpi_backlight=vendor
- dell_laptop.backlight=0 all also fix the issue. Using the last option
- however causes poor brightness control as the dell backlight driver is
- not properly optimized.
- 
- Related Reports:
- * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1082244
- * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1072891
- * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1048141
+ WORKAROUND: I have used the boot param noapic to run Ubuntu on this
+ laptop since 12.04, however acpi=off, acpi=noirq or
+ acpi_backlight=vendor dell_laptop.backlight=0 all also fix the issue.
+ Using the last option however causes poor brightness control as the dell
+ backlight driver is not properly optimized.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-37-generic 3.13.0-37.64
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
-  USERPID ACCESS COMMAND
-  /dev/snd/controlC0:  michael2066 F pulseaudio
+  USERPID ACCESS COMMAND
+  /dev/snd/controlC0:  michael2066 F pulseaudio
  CurrentDesktop: Unity
  Date: Sun Oct 19 15:50:18 2014
  HibernationDevice: RESUME=UUID=79996bc0-bea3-4008-9182-e2afa0585224
  InstallationDate: Installed on 2014-01-31 (260 days ago)
  InstallationMedia: Ubuntu 13.10 Saucy Salamander - Release amd64 
(20131016.1)
  MachineType: Dell Inc. Dell System XPS 15Z
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic 
root=UUID=4c859e77-4949-474c-9531-c6da9ef27187 ro noapic quiet splash
  RelatedPackageVersions:
-  linux-restricted-modules-3.13.0-37-generic N/A
-  linux-backports-modules-3.13.0-37-generic  N/A
-  linux-firmware 1.127.7
+  linux-restricted-modules-3.13.0-37-generic N/A
+  linux-backports-modules-3.13.0-37-generic  N/A
+  linux-firmware 1.127.7
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-16 (185 days ago)
  dmi.bios.date: 09/07/2012
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A12
  dmi.board.name: 060G42
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: 
dmi:bvnDellInc.:bvrA12:bd09/07/2012:svnDellInc.:pnDellSystemXPS15Z:pvr:rvnDellInc.:rn060G42:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System XPS 15Z
  dmi.sys.vendor: Dell Inc.

** Tags added: latest-bios-a12

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Title:
  Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

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[Bug 1382909] Re: Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

2014-10-21 Thread Joseph Salisbury
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.18 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, 
please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as 
Confirmed.


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-rc1-utopic/


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

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

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  Dell XPS 15Z Requires Kernel Parameters to Boot Correctly

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