modeswitch (flash to black) on intel between grub and plymouth
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
The Ubuntu Flicker-Free Boot Project |
New
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Incomplete
|
Low
|
Unassigned |
Bug Description
Even after ensuring I have an up-to-date grub installed with the hwcheck license fix (verified from the grub shell at boot time), I get a brief clear-to-black between the purple grub screen and the start of plymouth.
Possibly relevant details:
- plymouth is being started from the initramfs, not from the root system (cryptsetup)
- I have grub configured to show the boot menu automatically, instead of the default of auto-booting to the first option
- a plymouth debug log does show that plymouth is successfully using the drm backend, not the framebuffer backend; so this doesn't appear to be plymouth racing the kernel driver initialization.
Possibly relevant plymouth-debug.log snippets:
[main.c] check_for_
[main.c] check_for_
[main.c] redirect_
[main.c] initialize_
[main.c] attach_
<snip>
[./plugin.c] create_
[./plugin.c] load_driver:
[ply-terminal.c] ply_terminal_
[ply-terminal.c] ply_terminal_
[ply-terminal.c] ply_terminal_
[./plugin.c] ply_renderer_
<snip>
[main.c] add_pixel_
[main.c] plymouth_
[main.c] show_default_
Colin says this is unlikely to be a bug in grub given that hwcheck is succeeding, so reporting this against the kernel.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-
ProcVersionSign
Uname: Linux 3.0.0-11-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/pcmC0D0p: vorlon 3682 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf2520000 irq 44'
Mixer name : 'Intel IbexPeak HDMI'
Components : 'HDA:14f15069,
Controls : 12
Simple ctrls : 6
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'
Mixer name : 'ThinkPad EC 6QHT30WW-1.11'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Wed Sep 21 10:12:55 2011
HibernationDevice: RESUME=
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 003: ID 0a5c:217f Broadcom Corp. Bluetooth Controller
MachineType: LENOVO 3249CTO
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.60
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to oneiric on 2011-06-27 (86 days ago)
WifiSyslog:
dmi.bios.date: 08/23/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6QET52WW (1.22 )
dmi.board.name: 3249CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 3249CTO
dmi.product.
dmi.sys.vendor: LENOVO
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
summary: |
- flash to black between grub and plymouth in oneiric, with current grub + modeswitch (flash to black) on intel between grub and plymouth |
Changed in linux (Ubuntu): | |
status: | Confirmed → Triaged |
importance: | Undecided → Medium |
Attached is a short cameraphone video showing the behavior in question on a T60 where I can also reproduce it. The same result is seen whether plymouth is in the initramfs or not (i.e., it's reproducible on a test install that does not use cryptsetup), only the timing is different.
Andy has asked whether the clear to black might be related to a mode switch. The mode *looks* the same to me between grub and plymouth, but I don't know for sure.