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Problem: After the grub menu appears, system flashes messages and then screen goes blank. Efforts to get to a working screen have failed, so I have to power off. Note this problem occurs before I can even login, and also that I do not use a display manager.
Review of journalctl -b -1 shows nothing odd as far as I can see. In fact, I have seen no evidence of an error message anywhere.
I am not sure when this problem started, but I believe it was in the last two weeks.
The workaround has been to add the kernel parameter "nomodeset" , which does boot into a working system.
Installation of the linux-lts kernel still requires the nomodeset parameter. Installing alternative kernels does not seem to fix the problem.
This laptop has worked fine for a long time and the fact that this bone standard "iconic" laptop is having this problem is confusing me.
My system:
Lenovo T6VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV515/M52 [Mobility Radeon X1300]
Kernel: 4.2.5-1-ARCH #1 SMP PREEMPT Tue Oct 27 08:28:41 CET 2015 i686 GNU/Linux
Video Driver: xf86-video-ati
DE: gnome 3.18.2
Update status: fully updated.
QUESTION: I don't like the necessity of using nomodeset as it should not be required. How should I proceed to troubleshoot this issue?
Also note, my other laptop T60p, ATI graphics, as a very similar issue but in that case, I can not start X (it complains about nomodeset).
Ideas?
Last edited by stevepa (2015-11-13 18:16:29)
Arch - LVM - ext4 - gnome (T60p 14.1 1400p x86_64), (T60 15 flexview 1400p i686)
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Would you mind posting the logs as well as your kernel command line nevertheless?
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Would you mind posting the logs as well as your kernel command line nevertheless?
Do you want the complete journalctl log from a failing boot? (A lot of lines).
Kernel line is stock but will post.
I am at work, but can post it within 4 hours.
Thanks for the reply
Arch - LVM - ext4 - gnome (T60p 14.1 1400p x86_64), (T60 15 flexview 1400p i686)
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There is a bug in the current kernel and lts kernel with the radeon driver. You can fix it for now by reverting to kernel version 4.2.3-1.
https://bugs.archlinux.org/task/46902?o … ed%5B0%5D=
Last edited by TheChickenMan (2015-11-13 15:21:11)
If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet.
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There is a bug in the current kernel and lts kernel with the radeon driver. You can fix it for now by reverting to kernel version 4.2.3-1.
https://bugs.archlinux.org/task/46902?o … ed%5B0%5D=
This worked! Appreciate it. Will try this on my other nonfunctional laptop.
What I think is strange is why the lts kernel still would not boot without the nomodeset parameter...
Oh, well. Will just wait for the next released kernel.
Tks
Update: Downgrading the the kernel to 4.2.3-1 works for:
1. Lenovo Thinkpad T60
2. Lenovo Thinkpad T60p
Last edited by stevepa (2015-11-14 19:50:38)
Arch - LVM - ext4 - gnome (T60p 14.1 1400p x86_64), (T60 15 flexview 1400p i686)
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