Constantin Savtchenko, as per
http://download.lenovo.com/express/ddfm.html an update is available for
your BIOS (1.43). If you update to this, does it change anything?
If not, could you please both specify what happened, and provide the output of
the following terminal command:
sudo dmidecode -s
I'm not sure if it's related, but I'm also seeing that on a T520, I'm
*consistently* unable to boot with discrete graphics enabled. Either
Integrated or Optimus boots fine.
Screenshot:
http://i.stack.imgur.com/auxZP.jpg
And related StackExchange: http://askubuntu.com/questions/245886/why-is-
Good afternoon. After a kernel upgrade yesterday I am unable to boot
into 12.04.1 again. I managed to boot in initially using nomodeset
and reinstalled my Nvidia drivers (310.## I believe). However, now I
simply get stuck after a loading swap message.
Is there any new information on this issue?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.8 kernel[0] (Not a kernel in the daily directory) and install both
the linux-image and linux-image-extra .deb packages.
If this bug is fixed in the
Hi Joseph,
I followed the instructions as you suggested and installed the 3.8-rc5
kernel. I did not see improvement, thus I added the kernel-bug-exists-
upstream tag (I may needed to have added the kernel-unable-to-test-
upstream.)
Here's what happened:
- nomodeset was not a guaranteed
Confirming to T420s with 12.04.1 (both livecd and existing system with
the latest updates)
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https://bugs.launchpad.net/bugs/1083738
Title:
Booting Trouble With Lenovo T520 (NVS 4200M)
Good Evening and Happy New Year,
Attempted a reboot again after software install. This time no kernel
update, so no nomodeset at any time.
First, direct Restart attempt I got stuck at a purple screen. I
had to powercycle.
Second attempt, a power on instantly after the power down, I
Hi Joseph,
Updated my kernel headers today, did a reboot. Added nomodeset at grub
using 'e'. Booted successfully and recompiled NVidia drivers. Did a 'sudo
service lightdm start' successfully and finally rebooted once again.
At reboot, I got stuck at a purple screen (even though quiet
@Constaintin,
In the bug description, you mention that you left 12.04 and returned.
Did you perform a fresh install each time?
Also, does the bug go away if you disable the Nvidia card like mentioned
in comment #27?
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Joseph, yes every time was a indeed a fresh install. I never attempted
to disable the NVidia card in the BIOS. I did however, attempt the
opposite, enabling optimus and using the nouveau drivers. People
suggested they had luck with that, however I remember not succeeding.
Currently, I am
I have the same problem on Ubuntu 12.10.
Ubuntu starts only if Nvidia card is turned of in BIOS (Intel card is
selected).
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Title:
Booting
Joseph, I've checked with kernel 3.7 and it doesn't work
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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ALSO ALt-SysReq REISUB does not respond ever. The only way to recover
from these failure boots is to power cycle.
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Title:
Booting Trouble With
Kernel does not successfully boot for me to run required command.
Recovery mode also fails to boot.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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apport information
** Tags added: apport-collected precise running-unity staging
** Description changed:
I have been having booting trouble with my Lenovo for months. I have
consistently left 12.04 and had to use other systems. Sometimes I am
forced to return and try to see if this
Managed to boot into system by:
- Power cycling multiple times, booting regularly would bring to a similar
situation as https://bugs.launchpad.net/ubuntu/+source/linux/+bug/984127
- It would complain that fschk needs to be done, however, no button press or
command would respons
- I kept
Do you happen to know if this bug existed on previous versions of
Ubuntu, or have you only used Precise(12.04)?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.7 kernel[0] (Not a kernel in the
Joseph, this bug has existed since the unity change. I have had trouble
with 10.10, 11.04, 11.10. The last stable kernel/release to run on my
system successfully was 10.04.
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