Hi,
I recognize this problem on a Packard Bell Easynote TK36-AV-105.
http://tweakers.net/pricewatch/267864/packard-bell-easynote-tk36-av-105.html#tab:info
This laptop also contains a Integrated Intel GMA4500.
Is this a issue which is going to be solved in future releases of Linux/Ubuntu?
I'm back on Ubuntu 10.04.4 again but I have the output of lshw -c:
*-display:0 UNCLAIMED
description: VGA compatible controller
product: Mobile 4 Series Chipset Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list
configuration: latency=0
resources: memory:90000000-903fffff memory:80000000-8fffffff
ioport:4110(size=8)
*-display:1 UNCLAIMED
description: Display controller
product: Mobile 4 Series Chipset Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2.1
bus info: pci@0000:00:02.1
version: 09
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: latency=0
resources: memory:93400000-934fffff
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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:~#
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