Xorg segfaults on start-up on Big Endian PPC hardware

you need to bisect the patches to find out what breaks

Timo, I have done so and narrowed it down to the following patch: 188_default_primary_to_first_busid.patch

Can we conditionally NOT apply this to powerpc?

Correction, Timo, I have definitively traced this down to drm_device_keep_trying.patch. 188_default_primary_to_first_busid.patch is not the offending patch.

Ping. Can we please get this ticket out of incomplete state?

[Expired for xorg-server (Ubuntu) because there has been no activity for 60 days.]

Sorry for the delay, and thanks for the bisect. I'll modify the patch so that it's not used on non-x86. I'll drop it completely from y+1.

actually I'll just drop it from yakkety and think about what to do with xenial...

Thank you, this is very much appreciated.

This bug was fixed in the package xorg-server - 2:1.18.4-1ubuntu5

---------------
xorg-server (2:1.18.4-1ubuntu5) yakkety; urgency=medium

  * drm_device_keep_trying.patch: Dropped, shouldn't be needed anymore, and
    causes issues on non-x86 archs. (LP: #1581076)

 -- Timo Aaltonen <email address hidden> Fri, 02 Sep 2016 13:59:52 +0300

Status changed to 'Confirmed' because the bug affects multiple users.

How can we test to be sure drm_device_keep_trying.patch is no longer needed or watch for regressions if it really is needed?

A subtantially larger portion of users are now using SSD's, so if there was a race condition still in yakkety we'd probably know about it by now. But there is no other test than keep rebooting to check if the login manager comes up each time.

It's fine by me to keep the patch in the lts-xenial backport though, since trusty is still on upstart which might've played a part in this.

Hello Alex, or anyone else affected,

Accepted xorg-server into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/xorg-server/2:1.18.4-0ubuntu0.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Hi Andy,

Thanks very much. We will certainly test this ASAP once it lands in proposed, and report back.

I see that the build has completed successfully. I manually fetched and installed https://launchpad.net/ubuntu/+source/xorg-server/2:1.18.4-0ubuntu0.1/+build/10751236/+files/xserver-xorg-core_1.18.4-0ubuntu0.1_powerpc.deb , and Xorg came to life as expected, without the segfault.

This bug was fixed in the package xorg-server - 2:1.18.4-0ubuntu0.1

---------------
xorg-server (2:1.18.4-0ubuntu0.1) xenial; urgency=medium

  * New upstream bugfix release. (LP: #1619142)
  * randr-adjust-masters-last-set-time.diff,
    randr-do-not-check-the-screen-size.diff:
    Fix issues changing display mode on prime setups. (LP: #1586260)
  * os-treat-ssh-as-a-non-local-client.diff: Dropped, upstream.
  * drm_device_keep_trying.patch: Dropped, shouldn't be needed anymore,
    and causes issues on non-x86 archs. (LP: #1581076)
  * debian/patches/xmir.patch: backport XMir fixes from Ubuntu "Yakkety Yak"
    - fix button/menu focus failures (lp: #1590553)
    - ignore 'unnkown 11 event' (lp: #1617925)
    - don't call epoxy every frame (lp: #1617932)
    - fix unclickable parts of the screen after rotation (lp: #1613708)
    - fix key repeat issues (lp: #1591356)

 -- Timo Aaltonen <email address hidden> Thu, 01 Sep 2016 10:28:26 +0300

The verification of the Stable Release Update for xorg-server has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

Hello Alex, or anyone else affected,

Accepted xorg-server-lts-xenial into trusty-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/xorg-server-lts-xenial/2:1.18.4-0ubuntu0.2~trusty1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Hello Alex, or anyone else affected,

Accepted xorg-server-lts-xenial into trusty-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/xorg-server-lts-xenial/2:1.18.4-0ubuntu0.2~trusty2 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Status changed to 'Confirmed' because the bug affects multiple users.

patch fixes the bug