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View Full Version : [ubuntu] 11.04 Ubuntu laptop screen back lit failure



Greda
May 9th, 2011, 06:42 PM
Hello guys.
this is my problem.
when i upgrade from version 10.10 to 11.04 or when i install fresh 11.04 version i can barely see anything, as if there is something wrong with the screen, i assume the black lite is not working.

so i had to use the led diods from my webcam just to menage somehow to restart my system and use the windows :mad: boot so i can report this.

same was happening while 11.04 was beta and nothing changed now that its a "finished" product.

pls help , i love my Linux, and dont wanna use windows unless i am playing games.

HARDWARE SPECS:


[ System ]

System Properties:
Manufacturer eMachines
Product eMachines E725
Version V3.10
Serial Number XXXXXXXXXXXXXXXXXXXX
SKU# Montevina_Fab
Family Intel_Mobile
Universal Unique ID XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Wake-Up Type Power Switch


[ Motherboard ]

Motherboard Properties:
Manufacturer eMachines
Product eMachines E725
Version V3.10
Serial Number Base Board Serial Number

[ Mobile Intel(R) 4 Series Express Chipset Family ]

Video Adapter Properties:
Device Description Mobile Intel(R) 4 Series Express Chipset Family
Adapter String Mobile Intel(R) GMA 4500
BIOS String Intel Video BIOS
Chip Type Mobile Intel(R) 4 Series Express Chipset Family
DAC Type Internal
Memory Size 256 MB

GPU


[ Integrated: Intel GL40/GM45/GM47/GS45 Chipset - Graphics Controller 0 ]

Graphics Processor Properties:
Video Adapter Intel GL40/GM45/GM47/GS45 Chipset - Graphics Controller 0
BIOS Version Build Number: 1800 PC 14.34 05/10/2009 21:36:31
GPU Code Name Cantiga-GM
PCI Device 8086-2A42 / 1025-0212 (Rev 09)
Bus Type Integrated
RAMDAC Clock 300 MHz
Pixel Pipelines 4
TMU Per Pipeline 1
Unified Shaders 10 (v4.0)
DirectX Hardware Support DirectX v10

Graphics Processor Manufacturer:
Company Name Intel Corporation

sanderd17
May 9th, 2011, 06:43 PM
try setting the "nomodeset" boot option, see my signature. It worked for some.

I also had problems with backlight, but my OS would't boot at all and nomodeset didn't help. Switching to 32-bit instead of 64-bit did help in my case.

Greda
May 9th, 2011, 08:16 PM
ok this is totally weird now.

since i have dual boot, all of the sudden a new entery appeard "previous linux versions"

and when i select that instead of what is suppose to be latest version on top of the list
11.04 starts up perfectly with back light .....

though if i still try the first option in Grub it loads without back lighting.



is it me, or is the new version bit pre-mature. and whats that weird entry in my grub
"previous linux versions" (just to make sure i ran " cat /etc/issue " in terminal and it came up with " Ubuntu 11.04 \n \l " )

sanderd17
May 9th, 2011, 08:33 PM
The problem is the new kernel if I remember right, so starting ubuntu with an older kernel could help you (I don't have an older kernel since it's a fresh install). You can change grub to remove the top line.

In this terminology, a "version" is a kernel version, not an ubuntu version. In fact, it's the right terminology, Linux is the kernel and ubuntu are the GNU apps on top of the kernel, together they form GNU/Linux.

Greda
May 9th, 2011, 08:50 PM
well then i guess its solved, hope they fix this in the next image ...