Amol, I just rebooted to see, and I can also confirm brightness is
normal on GRUB and on the boot process until it loads the drivers. So I
guess the problem is the same then.

** Description changed:

  This is a regression from early Jaunty Alphas and Intrepid.
  
- When you boot, the screen brightness is set up to the lowest value. This
- remains like that in GDM, and is only set up to a reasonable value after
- you login and see your desktop.
+ When you boot, the screen starts at a normal brightness and stays that
+ way through GRUB, but becomes dark early in the linux boot process.
+ Specifically, when it says "loading hardware drivers", the screen
+ brightness is set up to the lowest value. This remains like that in GDM,
+ and is only set up to a reasonable value after you login and see your
+ desktop.
  
  For now, a workaround is to make the brightness higher with the
  brightness hotkeys on the laptop.
  
  I'm using an up-to-date Jaunty. Please ask for any information you think
  is necessary, I really don't know what thing is failing.
  
  Laptop Model: Acer Aspire 6930
  Graphics Card:
  00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset 
Integrated Graphics Controller (rev 07)
  00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset 
Integrated Graphics Controller (rev 07)
+ 
+ Other laptops/video cards with this same problem:
+ Acer Aspire 6930 / NVIDIA 9300 card (with both the free driver and the 
proprietary driver)
+ Acer Aspire 7730 / NVIDIA 9600M
+ Asus C90s / NVIDIA 8600 GT
+ Lenovo SL300 / NVIDIA 9300M

** Tags added: acer asus brightness intel lenovo nvidia

-- 
[jaunty] Screen brightness is minimal until login
https://bugs.launchpad.net/bugs/348043
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