ttys broken with kernel 2.6.31-13

Hi,

On my system (and seems that others are affected) switching from the X server to any tty using Ctrl+Alt+Fx keys results in some kind of nice paint artwork. The problem is that you cannot use any ttys since nothing is written on the screen. However you can continue to type in commands, and they're correctly taken into account.

I do not use any framebuffer parameters when booting, my boot string in grub is :
kernel /boot/vmlinuz-2.6.31-13-generic root=UUID=53dfbfeb-5955-48e2-9039-e6c3b9b219d0 ro quiet splash

The issue appeared after kernel upgrade to 2.6.31-13-generic, it was absent from 2.6.31-11-generic. The problem is that at the same time there was an NVidia driver upgrade, to I don't know if this is kernel-related or nvidia-driver related. However I think kernel is more likely to be affected.

Seems that it does not affect all the users, especially the ones with Intel X drivers. Someone with en EeePC was not affected, see there in French :
http://forum.ubuntu-fr.org/viewtopic.php?id=317166&p=77

This bug is quite critical I think, since it's critical to get vts sometimes to get out some blocking situations.

Rgds,

gojul

ProblemType: Bug
Architecture: i386
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'NVidia'/'HDA NVidia at 0xfe020000 irq 20'
   Mixer name : 'Analog Devices AD1988B'
   Components : 'HDA:11d4198b,104381f6,00100300'
   Controls : 48
   Simple ctrls : 26
Date: Sat Oct 10 12:06:03 2009
DistroRelease: Ubuntu 9.10
HibernationDevice: RESUME=UUID=1e2e6306-5da1-44ae-98dd-d137e96a8425
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.

 eth1 no wireless extensions.
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: System manufacturer System Product Name
NonfreeKernelModules: nvidia
Package: linux-image-2.6.31-13-generic 2.6.31-13.43
ProcCmdLine: root=UUID=53dfbfeb-5955-48e2-9039-e6c3b9b219d0 ro quiet splash
ProcEnviron:
 LANGUAGE=
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-13.43-generic
RelatedPackageVersions: linux-firmware 1.21
RfKill:

SourcePackage: linux
Uname: Linux 2.6.31-13-generic i686
WpaSupplicantLog:

dmi.bios.date: 10/02/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS M2N-SLI DELUXE ACPI BIOS Revision 1701
dmi.board.name: M2N-SLI DELUXE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: 1.XX
dmi.chassis.asset.tag: 123456789000
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSM2N-SLIDELUXEACPIBIOSRevision1701:bd10/02/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM2N-SLIDELUXE:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer