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TyIzaeL
October 12th, 2010, 03:08 AM
Hello.

I just upgraded my laptop to 10.10 and now when I boot the display doesn't show anything. This laptop worked flawlessly on 10.04. I can tell the underlying system is fine, because if I type my boot password the hard disk activity picks up like it is continuing to boot, and CTRL+ALT+DEL reboots the computer as one would expect.

When I boot using an old kernel (a leftover from 10.04 I think) via GRUB the system boots normally. What can I do about this?

My laptop is an HP Elitebook 2730p. According to the specs it uses an Intel GMA 4500MHD for graphics. I am using the 64-bit version of Ubuntu.

Cpierce
October 12th, 2010, 03:17 AM
Interested in seeing how to fix this. I lost the startup screen when I updated from 9.10 to 10.04. The same thing happens if I restore using clonezilla. It is not that big a deal, but it isn't "right" either.

TyIzaeL
October 12th, 2010, 03:18 AM
I didn't lose just the boot screen. My display isn't showing anything at all.

Cpierce
October 13th, 2010, 11:54 PM
Bump. Help please

oldfred
October 14th, 2010, 01:00 AM
My nvidia would just turn off monitor. Settings for several different video cards.

I have nvidia and my monitor went to standby & had to do this:
boot from the cd, press F6 and then select the nomodeset option.
(I acutally edited my grub.cfg as I use grub2 to directly boot ISO on USB, or in USB's syslinux.cfg or text.cfg)
then
On first boot after install, press e on getting the GRUB bootloader.
Using arrow keys navigate to and delete quiet and splash and type the word nomodeset in their place
Press Ctrl and X to boot (low graphics mode)

http://pricklytech.wordpress.com/2010/07/31/ubuntu-10-4-lucid-black-blank-screen-during-installation-live-cd/
https://wiki.ubuntu.com/X/Troubleshooting/Nouveau

https://help.ubuntu.com/community/BinaryDriverHowto/Nvidia
After I installed nvidia driver (default from pop up) then it has worked without issue.
gksudo nvidia-settings
sudo nvidia-xconfig
Or it should be in System>administration>Hardware drivers.

(from Fedora)
All drivers: nomodeset - this will disable the kernel modesetting feature and drop the user back to the old X.org infrastructure and behaviour.
nouveau.modeset=1

Some other settings:
http://ubuntu-tutorials.com/2010/05/06/ubuntu-10-04-lucid-blank-screen-at-startup-workaround/
* Older Intel video card: i915.modeset=1 or i915.modeset=0
* nVidia: nomodeset
* Generic: xforcevesa or nouveau.modeset=0
* Radeon: radeon.modeset=0

if you've got an i8xx Intel chipset, then the usual fix is to either add i915.modeset=1 or i915.modeset=0 to your boot
Other workarounds:
https://wiki.ubuntu.com/X/Bugs/Lucidi8xxFreezes
http://ubuntu-tutorials.com/2010/05/06/ubuntu-10-04-lucid-blank-screen-at-startup-workaround/

sdellutri
October 30th, 2010, 04:26 PM
I can confirm the same problem with the same laptop.
I have HP 2730p tablet. Worked fine with 10.04.
Put fresh install of 10.10 and now I have no video at all.
Not via LCD panel nor via external monitor.

Do I have to blow away the partitions and re-install 10.04..or is there a work around for this?

I attempted this


Older Intel video card: i915.modeset=1 or i915.modeset=0
but it didnt help

Very disappointing.