Bug 202538

Summary:	"i915kms_load="YES"" in /boot/loader.conf panics kernel in 10.1
Product:	Base System	Reporter:	Bob Madden <b0bfreebsd>
Component:	kern	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	Closed Overcome By Events
Severity:	Affects Only Me	CC:	bsd, emaste, imp, johalun0, zsnafzig
Priority:	---
Version:	10.1-RELEASE
Hardware:	amd64
OS:	Any

Description Bob Madden 2015-08-21 01:54:59 UTC

My HW: AMD FX-8300 3.3GHz Eight-Core OEM CPU/Asus M5A78L-M/USB3 mATX MB/8GB DDR3 1866 Kingston HyperX Fury Red Memory/128GB Adata Premier Pro SSD/CPU Cooler

My dilemma: When I installed 10.1 I realized that I had no virtual terminals. I researched this and realized that I needed to add a few things into my /boot/loader.conf to correct this. This is what I added:
root@hendrix:/boot # cat loader.conf
hw.vga.textmode=1
kern.vty=vt
# i915kms_load="YES"
kern.vt.fb.default_mode="640x480"
sem_load="YES"
snd_driver_load="YES"

The relevant issue is that when I switch to a virtual terminal the typeface is far too small, so I was looking to increase the Text Size. In my research it was advised to add "i915kms_load="YES"" ... but after doing that, which did NOT fix my ability to modify the Text Size, I realized that this consistently Panicked my Kernel after 10 minutes.

I thought I might bring this to your attention.

Thank you for your time.

Comment 1 Johannes Lundberg 2016-03-14 21:57:03 UTC

I was gonna file a bug report but found this.
On Macbook Air's 2012 (Sandybridge) and 2013 (Haswell) I can not load i915kms from loader.conf. If I do the system hangs. Loading is with kldload or via startx both works fine.

Comment 2 Andy 2016-03-23 02:08:43 UTC

I am having the same problem with a Thinkpad T440p.
I'm not running the most current current, but I didn't see any i915-related svn commits since.  From uname:

11.0-CURRENT FreeBSD 11.0-CURRENT #0 r297046: Sat Mar 19 02:16:14 EDT 2016
 
The cpu is:

CPU: Intel(R) Core(TM) i5-4300M CPU @ 2.60GHz (2594.05-MHz K8-class CPU)

When I load i915kms from /boot/loader.conf it will show the system booting and then go black.  No amount of blindly typing in l/p/shutdown works, so I have to power cycle.  Booting with that line commented out in loader.conf works fine, and I can then kldload i915kms without issue.

I'm not sure what more information I can provide that will be useful, but please let me know, I'm eager to help.

Comment 3 Ed Maste freebsd_committer

2017-09-12 20:11:20 UTC

My co-op student at the FreeBSD Foundation encountered this issue on a brand-new 12-current installation at r323435.

Comment 4 Zak 2017-09-12 20:54:17 UTC

(In reply to Ed Maste from comment #3)

setting: 
kern.smb.disabled=1 
i915kms_load="yes"
in /boot/loader.conf

allows my system to boot

Comment 5 Warner Losh freebsd_committer

2021-07-08 23:30:59 UTC

i915kms has been removed from the base system.
The new out-of-tree modules are documented as not working from the loader and we filter out their loading by default.