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#1 2017-01-30 16:51:23
- mcloaked
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- From: Yorkshire, UK
- Registered: 2012-02-02
- Posts: 1,238
[SOLVED] Another new boot problem with kernel 4.9.6-1
I updated a Lenovo laptop S540 today from kernel 4.8.13 to 4.9.6-1 and had a boot failure to graphics. I have reported upstream at https://bugzilla.kernel.org/show_bug.cgi?id=193681
Last edited by mcloaked (2017-01-30 20:26:48)
Mike C
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#2 2017-01-30 17:28:56
- loqs
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- Registered: 2014-03-06
- Posts: 17,323
Re: [SOLVED] Another new boot problem with kernel 4.9.6-1
That looks like an issue with the radeon module.
Does the issue still occur if you disable the radeon module?
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#3 2017-01-30 18:04:12
- mcloaked
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- From: Yorkshire, UK
- Registered: 2012-02-02
- Posts: 1,238
Re: [SOLVED] Another new boot problem with kernel 4.9.6-1
That looks like an issue with the radeon module.
Does the issue still occur if you disable the radeon module?
For a long time I have been successfully using a file:
$ cat /etc/modprobe.d/blacklist.conf
install radeon /bin/false
But this seems not to work for the 4.9.6-1 kernel
Edit: I have compared the logs for 4.8.13 and 4.9.6 - all the lines in the newer kernel where the problems occur during boot relate to the new amdgpu driver that was introduced in the 4.9 series. However it seems that early KMS loading the module is mandatory so it is not clear whether it is possible to blacklist that new module or whether the radeon module is also available to be used in the kernel or not. Any advice on how to work around this issue would be appreciated. This machine has hybrid discrete radeon GPU and integrated Intel GPU.
Last edited by mcloaked (2017-01-30 19:55:13)
Mike C
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#4 2017-01-30 20:26:32
- mcloaked
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- From: Yorkshire, UK
- Registered: 2012-02-02
- Posts: 1,238
Re: [SOLVED] Another new boot problem with kernel 4.9.6-1
The solution to this problem is not the kernel - but it turned out that there is a relatively new driver package in arch( xf86-video-amdgpu) which was not previously installed in my system, but was needed as soon as the 4.9.x series kernels was installed. Once that package was installed, and I regenerated the initramfs including the amdgpu module in the mkinitcpio.conf file, then the system booted to graphics normally.
There is already information about this driver package in the wiki but I hadn't noticed it before getting to the solution to this issue.
Last edited by mcloaked (2017-01-30 22:15:41)
Mike C
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