Ubuntu 11.04 will not install, the backlight of my comptuer is off when i run the installer for 11.04. I have tried reburning and redownloading, no go.

Mam UBUNTU 11.04 i Laptop Emachines E725 aktualizowane z wersji poprzedniej. Na kernelu 2.6.38-8 i 2.6.38-9 system się uruchamia, słychać dźwięk powitalny lecz nic nie widać. Na kernelu 2.6.35-28 wszystko działa poprawnie. Oto lista sprzętu:

lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 09)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 09)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation ICH9M/M-E 2 port SATA IDE Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
00:1f.5 IDE interface: Intel Corporation ICH9M/M-E 2 port SATA IDE Controller (rev 03)
04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
05:00.0 Ethernet controller: Atheros Communications AR8132 Fast Ethernet (rev c0)

I have a Ubuntu 11.04 and eMachines E725 laptop upgraded from previous version. Kernel 2.6.38-8 and 2.6.38-9 the system starts up, you hear the welcome sound but do not see anything. Kernel 2.6.35-28 everything works properly. Here is a list of equipment:

Still no fix?

Please subscribe the bug I linked the question. It will give it more weight and you will be warned as soon a fix will be divered.

In addition to subscribing to bug 765438, which you have done, please also indicate that it affects you using the green "This bug affects..." link near the top of the bug page, if you have not done so already. That will further help Ubuntu developers gauge how widespread this bug is, and will thus help give it further weight.

Have you tried the workarounds suggested in bug 765438?

(1) https://bugs.launchpad.net/ubuntu/+source/linux/+bug/765438/comments/2

(2) If that doesn't work, you can try the workaround described in the bug's description, i.e., after booting, run this command (in a Terminal window or virtual console) to manually set your backlight to the highest brightness:

sudo setpci -s 00:02.0 F4.B=00

(If that works, you can set up your computer to run that automatically as part of the start-up process.)

(3) If that doesn't work either, you can try using a patched kernel and power manager, as described at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/765438/comments/11.

(4) If that fails, and you're on a 2.6.38-series kernel, you can downgrade to the 2.6.35-series, which does not seem to have this problem (or does not have it as often).

If you have trouble implementing any of these workarounds, please feel free to post another reply in this question to get help. Workarounds (3) and (4) would be difficult to do on a live CD, since rebooting is necessary in order to start running a new kernel. It would therefore be necessary for you to make a custom CD (https://help.ubuntu.com/community/LiveCDCustomization), which is somewhat technical.