[Bug 1048261] Re: Blank screen during system startup with Precise/Nouveau
Steve Langasek
steve.langasek at canonical.com
Tue Sep 11 14:57:40 UTC 2012
Ok, the key bit of the log is this:
[./plugin.c] query_device:Visual was
FB_VISUAL_PSEUDOCOLOR, trying to find usable mode.
[./plugin.c] query_device:Visual is
FB_VISUAL_PSEUDOCOLOR; not using graphics
This means your kernel is only presenting a 16-bit framebuffer for use,
not a 32-bit framebuffer; plymouth doesn't support properly displaying
on a 16-bit fb, so avoids using the fb at all to not present you with
horrible wrong color palettes.
If this worked for you in lucid with a full-color splash screen, then
there seems to be a bug in the nouveau kernel driver for no longer
exposing the expected 32-bit framebuffer. Reassigning to the kernel.
If this can't be fixed in the kernel, we should blacklist this card in
grub-gfxpayload-lists.
** Package changed: plymouth (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1048261
Title:
Blank screen during system startup with Precise/Nouveau
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
Hello,
if I boot the Precise installation on the PC this report has been sent
from (using Nouveau drivers on a Geforce 2 MX card), the screen stays
blank ("No Signal") during the boot process:
- The grub menu is displayed as usual (allthough in low resolution of 1024x768, while the display's native resolution is 1280x1024)
- Then a few seconds after the text of the grub menu disappeared, the screen goes blank (and turns of a few seconds later due to lack of input signal). In this phase usually the Plymouth boot logo should appear.
- When the display manager is loaded, the screen finally turns back on again/receives input again.
This happens regardless if the system is upgraded or freshly
installed.
It is also a regression from Lucid, where the boot process worked
without such problems on this machine (also with Nouveau drivers).
If I set GRUB_GFXPAYLOAD_LINUX=text in /etc/default/grub, I get the
text-only boot logo with correct screen resolution on startup and
monitor doesn't power off in this case.
If I boot using "nomodeset", the graphical boot logo is displayed
correctly but the screen resolution on the desktop is limited to
1024x768 (which is not acceptable).
Kind regards,
Jan
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: plymouth 0.8.2-2ubuntu30
ProcVersionSignature: Ubuntu 3.2.0-30.48-generic-pae 3.2.27
Uname: Linux 3.2.0-30-generic-pae i686
ApportVersion: 2.0.1-0ubuntu12
Architecture: i386
Date: Sun Sep 9 16:34:19 2012
DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
MachineType: ECS K7S5A
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-30-generic-pae root=UUID=979d6337-c3a8-4daa-9a97-4cd021dcb572 ro quiet splash vt.handoff=7
ProcEnviron:
TERM=xterm
PATH=(custom, user)
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcFB: 0 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-30-generic-pae root=UUID=979d6337-c3a8-4daa-9a97-4cd021dcb572 ro quiet splash vt.handoff=7
SourcePackage: plymouth
TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
UpgradeStatus: Upgraded to precise on 2012-09-09 (0 days ago)
dmi.bios.date: 04/02/01
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 07.00T
dmi.board.name: K7S5A
dmi.board.vendor: ECS
dmi.board.version: 1.0
dmi.chassis.asset.tag: 0123ABC
dmi.chassis.type: 3
dmi.chassis.vendor: ECS
dmi.chassis.version: Version 1.00
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr07.00T:bd04/02/01:svnECS:pnK7S5A:pvr1.0:rvnECS:rnK7S5A:rvr1.0:cvnECS:ct3:cvrVersion1.00:
dmi.product.name: K7S5A
dmi.product.version: 1.0
dmi.sys.vendor: ECS
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