Then it's highly likely that the culprit is one of the following
commits:
$ git log --pretty=oneline v4.13-rc2..v4.13-rc3 drivers/gpu/drm | grep -E
'dp|nouveau'
38bcb208f60924a031b9f809f7cd252ea4a94e5f drm/nouveau/bar/gf100: fix access to
upper half of BAR2
a90e049cacd965dade4dae7263b4d3fd550e78b6 drm/nouveau/disp/nv50-: bump max chans
to 21
746c842d1f64caad81d82f0054c0e063c8aa5399 drm/nouveau/kms: remove call to
drm_crtc_vblank_off() during unload/suspend
4a5431af19bc52c4dd491e989543c66a52380f00 drm/nouveau/kms/nv50: update vblank
state in response to modeset actions
587f577e0beb4d20ee60bac8d21134b4c5a9fd29 drm/nouveau/disp: add tv encoders to
output resource mapping
13a86519202c5d119d83640d6f781f3181205d2c drm/nouveau/i2c/gf119-: add support
for address-only transactions
967003bb2cae121d345fd807eb757d9422229713 drm/dp: Don't trust
drm_dp_downstream_id()
c11a93f5fd9229dc7c8b90570c75cf70bc3976c2 drm/dp: Fix read pointer for
drm_dp_downsteam_debug()
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1723619
Title:
Ubuntu Desktop ISO fails to boot with nouveau on a displayport
Status in Release Notes for Ubuntu:
New
Status in linux package in Ubuntu:
Confirmed
Bug description:
On the latest daily artful image (/current as of 2017-01-14), the
following occurs on a system with nVidia graphics (on my system, a
GTX970) when connected to a 4k display over a displayport:
https://photos.app.goo.gl/gLUva3Vgvtv0lAmj2
Steps to reproduce:
- Download latest daily image, check checksums, burn to USB
- Boot from USB.
- Choose "Install Ubuntu" or "try ubuntu" at the menu.
This happens on the livecd, but also upon ugrading the system from a
previous daily with a different kernel: my "old" daily booted and
installed fine with kernel 4.12.0-12, then failed with same error once
dist-upgraded.
On the faulty system I could test with, it seems to *only* happen over
displayport/on a 4k screen (I don't own a non-4k displayport screen to
test the 4k out).
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-release-notes/+bug/1723619/+subscriptions
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