Bug 18821

Summary:	GNOME or PLASMA fail to start on newer Dell XPS15 laptop with InfinityEdge 4K Ultra HD (3 840 x 2 160), 15,6" screen
Product:	Mageia	Reporter:	Olivier LE ROY <olivier_le_roy>
Component:	RPM Packages	Assignee:	Thomas Backlund <tmb>
Status:	RESOLVED FIXED	QA Contact:
Severity:	critical
Priority:	Normal	CC:	marja11, thierry.vignaud, tmb
Version:	Cauldron
Target Milestone:	---
Hardware:	x86_64
OS:	Linux
See Also:	https://bugs.mageia.org/show_bug.cgi?id=18822
Whiteboard:
Source RPM:		CVE:
Status comment:
Attachments:	Xorg log file Xorg configuration file

Description Olivier LE ROY 2016-06-30 08:26:53 CEST

Description of problem:
It is possible to get the xsession screen in full UHD resolution but once login credentials are entered, Plasma or Gnome won't start, returning to the xsession screen immediately.
This is not a problem of optimus graphics cards on these Dell laptop, because, I blacklisted the nouveau driver in Grub2 with "rd.driver.nouveau=blacklist" or "nouveau.modeset=0" options.
Please see xorg config file and log attached. xsession starts in full UHD resolution but Plasma or Gnome won't start.

Version-Release number of selected component (if applicable):
Mageia 6 cauldron up to date as of 2016-06-29

How reproducible:
Systematically

Steps to Reproduce:
1. Boot Linux
2. In xsession screen, enter the login and password, choose Plasma or Gnome and click on "Identification".
3. Plasma or Gnome won't start, returning to the xsession screen immediately.

Comment 1 Olivier LE ROY 2016-06-30 08:28:31 CEST

Created attachment 8092 [details]
Xorg log file

Comment 2 Olivier LE ROY 2016-06-30 08:29:09 CEST

Created attachment 8093 [details]
Xorg configuration file

Comment 3 Marja Van Waes 2016-06-30 09:51:08 CEST

(In reply to Olivier LE ROY from comment #0)
> Description of problem:
> It is possible to get the xsession screen in full UHD resolution but once
> login credentials are entered, Plasma or Gnome won't start, returning to the
> xsession screen immediately.
> This is not a problem of optimus graphics cards on these Dell laptop,
> because, I blacklisted the nouveau driver in Grub2 with
> "rd.driver.nouveau=blacklist" or "nouveau.modeset=0" options.

Could you please try what worked for Peter Woldering and others in bug 16245, see
https://bugs.mageia.org/show_bug.cgi?id=16245#c5 :

> It is working now :-)
> 
> I use the boot options 'rdblacklist=nouveau nouveau.runpm=0 xdriver=intel'
> 
> nouveau.runpm=0 is a tip from doktor500, with this the LiveDVD/USB gives
> nouveau errors but I get at least at every boot a KDE desktop.
> 
> The same boot options I use for the installed system.
> Right after install with the first boot I selected 'Safe Mode' and added
> 'blacklist nouveau' to /etc/modprobe.conf.
> 
> After this I get no errors and get a beautiful Mageia KDE desktop.

Keywords: (none) => NEEDINFO
CC: (none) => marja11, thierry.vignaud, tmb

Comment 4 Olivier LE ROY 2016-07-01 08:23:14 CEST

Hi,

I used 'rdblacklist=nouveau nouveau.runpm=0 xdriver=intel' options in grub2, as advised in bug 16245, (https://bugs.mageia.org/show_bug.cgi?id=16245#c5).

rdblacklist=nouveau is deprecated, I had to change it to rd.driver.blacklist=nouveau.

But in this case, the X server doesn't start at all.

It looks as though forcing the use of intel driver doesn't allow the X server to work.

Regards,

Olivier le Roy

Marja Van Waes 2016-07-01 10:39:33 CEST

Keywords: NEEDINFO => (none)
Assignee: bugsquad => tmb

Marja Van Waes 2016-07-01 10:40:46 CEST

See Also: (none) => https://bugs.mageia.org/show_bug.cgi?id=18822

Comment 5 Olivier LE ROY 2016-07-06 22:15:51 CEST

I could eventually have this issue solved, though the fix is still unclear to me.

I had to go through the installation process of Mageia 6 cauldron again.

After update and reboot, I could have access to a console (which was no longer possible before) and I had to remove all Nvidia component the following way:

rpm -qa | grep nvidia | xargs urpme

After this, I could reboot and, without specifiying arguments in grub2, the i915 driver was automatically selected, and is now functional.

Thanks for your help,

regards,

Olivier le Roy

Status: NEW => RESOLVED
Resolution: (none) => FIXED