Anand Vaidya, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ .
If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report: apport-collect -p linux <replace-with-bug-number> Also, could you please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags: kernel-fixed-upstream kernel-fixed-upstream-VERSION-NUMBER where VERSION-NUMBER is the version number of the kernel you tested. For example: kernel-fixed-upstream-v3.13-rc1 This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag: needs-upstream-testing If the mainline kernel does not fix this bug, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-VERSION-NUMBER As well, please remove the tag: needs-upstream-testing Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding. ** Tags removed: black blank gma4500m intel screen video ** Tags added: needs-kernel-logs needs-upstream-testing -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1047483 Title: Ubuntu 12.10 Intel GMA4500M Display is blank upon bootup Status in “linux” package in Ubuntu: Incomplete Bug description: kubuntu / ubuntu 12.10 Intel GMA 4500M Black screen problem Installed the latest Kubuntu 12.10 on my Acer Aspire 4736Z laptop. However, the display is blank/black. The OS seems to have started correctly (keystrokes result in expected results, albeit flying blind) but only display is blank. The video adapter is Intel GMA4500M chip. This has been the case with (k)ubuntu 12.04 and 11.10 too. I remember the same laptop used to work just fine earlier (9.10 probably?) Google search led me to the following forums threads: http://ubuntuforums.org/showthread.php?t=1237873 http://forums.gentoo.org/viewtopic-t-892206-start-0.html User cach0rr0 on the Gentoo forum mentions that setting /sys/class/backlight/acpi_video0/brightness to value 8 and rebooting immediately (say Ctrl-Alt-Del) retains the value and the display works fine. There should not be a power off/on sequence in between, since that destroys the value we have written into the register. So, I thought I could automate the same I modified my /etc/rc.local to detect the setting and if "wrong" set it to 8 and reboot. If the value is 8, the system completes the bootup and is ready for user login. The only "problem" with this trivial fix is that when powering on the laptop, it reboots automatically once. Suspend/Resume seems to work fine for me. catroot@asp4736-k1210:~# cat /etc/rc.local #!/bin/sh -e # # rc.local # # This script is executed at the end of each multiuser runlevel. # Make sure that the script will "exit 0" on success or any other # value on error. # # In order to enable or disable this script just change the execution # bits. # # By default this script does nothing. d=`date` bv=`cat /sys/class/backlight/acpi_video0/brightness` if [ $bv != "8" ];then echo 8 >/sys/class/backlight/acpi_video0/brightness echo "$d: acpi_video0 brightness is $bv so rebooting" >>/var/log/acpi_brightness.txt reboot else echo "$d: acpi_video0 brightness is $bv" >> >>/var/log/acpi_brightness.txt fi exit 0 root@asp4736-k1210:~# 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.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (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) 00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (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.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 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] (rev 03) 00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03) 00:1f.6 Signal processing controller: Intel Corporation 82801I (ICH9 Family) Thermal Subsystem (rev 03) 04:00.0 Network controller: Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01) 05:00.0 Ethernet controller: Atheros Communications Inc. AR8121/AR8113/AR8114 Gigabit or Fast Ethernet (rev b0) 07:00.0 System peripheral: JMicron Technology Corp. SD/MMC Host Controller 07:00.2 SD Host controller: JMicron Technology Corp. Standard SD Host Controller 07:00.3 System peripheral: JMicron Technology Corp. MS Host Controller 07:00.4 System peripheral: JMicron Technology Corp. xD Host Controller root@asp4736-k1210:~# To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1047483/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
