Public bug reported:
Display hardware specifications [sudo lshw -c display]:
*-display:0
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: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:44 memory:50000000-503fffff memory:40000000-4fffffff
ioport:50f0(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: pm bus_master cap_list
configuration: latency=0
resources: memory:53400000-534fffff
I'm not sure about what factors exactly are leading to this result, but
installing the said version of the kernel package on either 10.10 and
11.04 completely darkens my screen. If I press the power button or open
a window with keyboard shortcuts I can make out they're open but can't
view them at all.
10.10
I downloaded 2.6.38-7 kernel package for Ubuntu and installed them on 10.10
dual-booted with Windows 7. On reboot I could not make out anything on the
screen, and assuming Ubuntu did not load properly, I was about to try a hard
shutdown. But on pressing the power button, I noticed that there was a dim glow
of the Shut Down window , from which I selected restart using the keyboard.
Since the next boot did not improve anything, I chose older kernel, which
displayed everything normally again.
11.04
Installing Natty wiped of my HDD of 10.10 and Windows 7 for which I suspect an
unrelated bug. The said kernel image installed through the usual updates, and I
was returned to the dim screen I experienced in 10.10. Since I did not know how
to bring up the GRUB menu at boot with a single OS, I used a flashlight to find
the kernel package on Software Center and removed it. Screen worked fine after
reboot.
Thus I conclude that the kernel image is at fault for the screen
dimming. As I said, I'm not aware of all the possible factors involved
in this bug, so I've listed my display hardware specifications for now
and narrated to how I've come to suspect the kernel image for this bug.
Please post your thoughts on this matter, and instruct me on diagnosing
it.
I've removed the kernel package, so I cannot comply with bug reporting
guidelines, but this is my current output of 'lsb_release -rd':
Description: Ubuntu Natty (development branch)
Release: 11.04
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- Kernel 2.6.38-7 completely dims screen
+ Kernel 2.6.38-7 completely dims screen on Intel T4500M
** Summary changed:
- Kernel 2.6.38-7 completely dims screen on Intel T4500M
+ Kernel 2.6.38-7 completely dims screen on Intel GMA 4500M
** Description changed:
- Display hardware specifications:
- *-display:0
- 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: msi pm vga_controller bus_master cap_list rom
- configuration: driver=i915 latency=0
- resources: irq:44 memory:50000000-503fffff memory:40000000-4fffffff
ioport:50f0(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: pm bus_master cap_list
- configuration: latency=0
- resources: memory:53400000-534fffff
+ Display hardware specifications [sudo lshw -c display]:
+ *-display:0
+ 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: msi pm vga_controller bus_master cap_list rom
+ configuration: driver=i915 latency=0
+ resources: irq:44 memory:50000000-503fffff memory:40000000-4fffffff
ioport:50f0(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: pm bus_master cap_list
+ configuration: latency=0
+ resources: memory:53400000-534fffff
I'm not sure about what factors exactly are leading to this result, but
installing the said version of the kernel package on either 10.10 and
11.04 completely darkens my screen. If I press the power button or open
a window with keyboard shortcuts I can make out they're open but can't
view them at all.
10.10
I downloaded 2.6.38-7 kernel package for Ubuntu and installed them on 10.10
dual-booted with Windows 7. On reboot I could not make out anything on the
screen, and assuming Ubuntu did not load properly, I was about to try a hard
shutdown. But on pressing the power button, I noticed that there was a dim glow
of the Shut Down window , from which I selected restart using the keyboard.
Since the next boot did not improve anything, I chose older kernel, which
displayed everything normally again.
11.04
Installing Natty wiped of my HDD of 10.10 and Windows 7 for which I suspect
an unrelated bug. The said kernel image installed through the usual updates,
and I was returned to the dim screen. Since I did not know how to bring up the
GRUB menu at boot with a single OS, I used a flashlight to find the kernel
package on Software Center and removed it. Screen worked fine after reboot.
Thus I conclude that the kernel image is at fault for the screen
dimming. As I said, I'm not aware of all the possible factors involved
in this bug, so I've listed my display hardware specifications for now
and narrated to how I've come to suspect the kernel image for this bug.
Please post your thoughts on this matter, and instruct me on diagnosing
it.
I've removed the kernel package, so I cannot comply with bug reporting
guidelines, but this is my current output of 'lsb_release -rd':
Description: Ubuntu Natty (development branch)
Release: 11.04
** Description changed:
Display hardware specifications [sudo lshw -c display]:
*-display:0
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: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:44 memory:50000000-503fffff memory:40000000-4fffffff
ioport:50f0(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: pm bus_master cap_list
configuration: latency=0
resources: memory:53400000-534fffff
I'm not sure about what factors exactly are leading to this result, but
installing the said version of the kernel package on either 10.10 and
11.04 completely darkens my screen. If I press the power button or open
a window with keyboard shortcuts I can make out they're open but can't
view them at all.
10.10
I downloaded 2.6.38-7 kernel package for Ubuntu and installed them on 10.10
dual-booted with Windows 7. On reboot I could not make out anything on the
screen, and assuming Ubuntu did not load properly, I was about to try a hard
shutdown. But on pressing the power button, I noticed that there was a dim glow
of the Shut Down window , from which I selected restart using the keyboard.
Since the next boot did not improve anything, I chose older kernel, which
displayed everything normally again.
11.04
- Installing Natty wiped of my HDD of 10.10 and Windows 7 for which I suspect
an unrelated bug. The said kernel image installed through the usual updates,
and I was returned to the dim screen. Since I did not know how to bring up the
GRUB menu at boot with a single OS, I used a flashlight to find the kernel
package on Software Center and removed it. Screen worked fine after reboot.
+ Installing Natty wiped of my HDD of 10.10 and Windows 7 for which I suspect
an unrelated bug. The said kernel image installed through the usual updates,
and I was returned to the dim screen I experienced in 10.10. Since I did not
know how to bring up the GRUB menu at boot with a single OS, I used a
flashlight to find the kernel package on Software Center and removed it. Screen
worked fine after reboot.
Thus I conclude that the kernel image is at fault for the screen
dimming. As I said, I'm not aware of all the possible factors involved
in this bug, so I've listed my display hardware specifications for now
and narrated to how I've come to suspect the kernel image for this bug.
Please post your thoughts on this matter, and instruct me on diagnosing
it.
I've removed the kernel package, so I cannot comply with bug reporting
guidelines, but this is my current output of 'lsb_release -rd':
Description: Ubuntu Natty (development branch)
Release: 11.04
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/740893
Title:
Kernel 2.6.38-7 completely dims screen on Intel GMA 4500M
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