I’ve been following the development of Ubuntu 12.04 with interest, hoping that it would fix the annoying bug that affects the i7 chip in my laptop. In brief, the bug forces me to set the ‘noapic’ flag in the boot options before the machine will boot correctly. After a number of weeks of testing the live disk occasionally, I can happy report that the ‘noapic’ flag is no longer needed to book Ubuntu 12.04 on a ThinkPad L520 (with the SandyBridge i7).
But….
Now there is a new, and even more annoying bug which I have to wait to be fixed. Unlike the one above, which I could get around using a boot flag, I haven’t found a work-around for this one yet.
My primary laptop monitor doesn’t work.
When I boot into 12.04, the system boots correctly, but all I get is a black screen. I’ve plugged in an external monitor, and it displays without an issue on that, but it’s a laptop, so that’s not a practical solution. There are no extra drivers that I know of to be installed. I’m completely stuck, and unless it gets fixed, I’m not upgrading any time soon.
I have posted a bug, if you’ve any experience with this sort of thing, please take a look and see if you can help me:
Hi, could you please tell which kernel you are using exactly? And in addition your boot parameters?
I’ve a L520 too, although with a i5 but with the same noapic problem.
Thank’s in advance, Sascha
Not sure if you meant in 12.04 or 11.10. I’ve just booted into a Live CD for 12.04, so here are my details for that. I’ll post 11.10 in a minute or two when I reboot.
Grub parameters, although I did boot with ‘nomodeset’ enabled from the Live CD menu as well:
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash”
And my Kernel:
Linux ubuntu 3.2.0-8-generic #15-Ubuntu SMP Wed Jan 11 13:57:44 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
And running 11.10, I have:
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash noapic”
Linux gandalf 3.0.0-15-generic #25-Ubuntu SMP Mon Jan 2 17:44:42 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux