Ubuntu Lucid 10.04 / Acer 5021WMLi / Screen flickers / nearly blank after resume from suspend (regression)

[Arto Huotari]

Possible duplicates

492392 but this lists older kernel as fixed.
510004 but display does not look like it is in console mode.
For display see photograph

http://ubuntuone.com/p/3S1/

of the display after resuming and after submitting of the password. Before submitting the password the vertical lines were visible for too short a time to take a picture (timing problem).

574848 but only occasionally the screen is totally blank. I did also test the live cd of lucid and it resumed with blank screen from suspend. No horizontal lines.

Steps to reproduce
1. Start computer
2. After booting to desktop select from top right menu suspend
3. After suspending press power button
4. Screen shows only occasional gray horizontal lines with max height of aproximatelly 1 in.
5. Input password -> vertical lines will be drawn for a longer time, can fill the screen up to 2/3rd:s of the height. Also the lines will have more colors than gray.

It should be noted that 9.10 had similar occasional issue. With 9.10 the screen occasionally got garbled when switching user or after pressing ctrl+alt+f(n). But with 9.10 suspend worked and the display normally would revert back to normal after pressing ctrl+alt+f(n) a few times with different (n)'s. Also the behaviour was notably different as can be seen from photograph

http://ubuntuone.com/p/3SJ/

Also it should be noted that with lucid ctrl+alt+f(n) trick does not work and altGr + sysrq + k does not have any effect.
Also it should be noted that workaround of adding kernel command line option radeon.new_pll=0 as mentioned in bug 543045 does not have any effect.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-headers-2.6.32-22 2.6.32-22.33
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: acer5020 1370 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'IXP'/'ATI IXP rev 2 with ALC655 at 0xc0003400, irq 17'
   Mixer name : 'Realtek ALC655 rev 0'
   Components : 'AC97a:414c4760'
   Controls : 41
   Simple ctrls : 26
Card1.Amixer.info:
 Card hw:1 'Modem'/'ATI IXP Modem rev 2 at 0xc0003800, irq 17'
   Mixer name : 'Conexant id 23'
   Components : 'AC97m:43585423'
   Controls : 2
   Simple ctrls : 2
Card1.Codecs.codec97.0.mc97.1.1:
 1-1/0: Conexant id 23

 Extended modem ID: codec=1 LIN1
 Modem status : PRA(GPIO) PRB(res) PRC(ADC1) PRD(DAC1) PRE(ADC2) PRF(DAC2) PRG(HADC) PRH(HDAC)
 Line1 rate : 8000Hz
Date: Wed May 12 21:45:30 2010
HibernationDevice: RESUME=UUID=6dc233cb-ce38-4363-8a38-52167f1fac5a
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Lsusb:
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Acer Aspire 5020
PackageArchitecture: all
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=4b81d52f-44d1-40c9-881b-50665da138ec ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
SourcePackage: linux
dmi.bios.date: 12/19/2005
dmi.bios.vendor: Phoenix
dmi.bios.version: V1.20
dmi.board.name: Aspire 5020
dmi.board.vendor: Acer
dmi.board.version: Rev.A
dmi.chassis.type: 10
dmi.chassis.vendor: N/A
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenix:bvrV1.20:bd12/19/2005:svnAcer:pnAspire5020:pvr-1:rvnAcer:rnAspire5020:rvrRev.A:cvnN/A:ct10:cvrN/A:
dmi.product.name: Aspire 5020
dmi.product.version: -1
dmi.sys.vendor: Acer

[Jeremy Foshee (jeremyfoshee)]

Hi Aerto,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

    [This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Arto Huotari (roskapostiaminulle)]

Unfortunately problem persists with the latest Kernel build

I downloaded and installed

linux-headers-2.6.34-999-generic_2.6.34-999.201005172238_i386
linux-headers-2.6.34-999-generic_2.6.34-999.201005181210_i386
linux-image-2.6.34-999-generic_2.6.34-999.201005172238_i386
linux-image-2.6.34-999-generic_2.6.34-999.201005181210_i386

using

sudo dpkg -i *.deb

synaptic reports that

linux-headers-2.6.34-999-generic_2.6.34-999.201005181210_i386

is broken. Image

linux-image-2.6.34-999-generic_2.6.34-999.201005181210_i386

seems to be ok.

[Arto Huotari (roskapostiaminulle)]

I marked this bug as duplicate of 430245.
Adding nomodeset option to /etc/default/grub to line

GRUB_CMDLINE_LINUX="nomodeset"

is a workaround as stated in 430245

Hardware: Acer Aspire 5020 / ATI Radeon x700

It also seems that with nomodesetoption there is no need for --quirk-vbe-post in
/usr/lib/pm-utils/video-quirks/20-video-quirk-pm-acer.quirkdb
section

match system.hardware.product regex 5000|5020|5500
    addquirk --quirk-vbe-post

since removing quirk did not have any noticeable effect on resuming when superficially tested.