Date: Sun, 26 Apr 2020 12:15:38 +0000 From: bugzilla-noreply@freebsd.org To: x11@FreeBSD.org Subject: maintainer-feedback requested: [Bug 245923] graphics/drm-fbsd12.0-kmod: 12.1-stable crash on loading i915kms.ko Message-ID: <bug-245923-7141-onw7ztexzI@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-245923-7141@https.bugs.freebsd.org/bugzilla/> References: <bug-245923-7141@https.bugs.freebsd.org/bugzilla/>
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Bugzilla Automation <bugzilla@FreeBSD.org> has asked freebsd-x11 mailing li= st <x11@FreeBSD.org> for maintainer-feedback: Bug 245923: graphics/drm-fbsd12.0-kmod: 12.1-stable crash on loading i915km= s.ko https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D245923 --- Description --- After upgrading 12.1-STABLE from r359345 to r360192, with graphics/drm-kmod= and graphics/drm-fbsd12.0-kmod rebuilt and reinstalled together with the new kernel, the system crashes when loading i915kms.ko. When loading the module via kld_list in /etc/rc.conf at boot, screen goes blank and system stops respon= ding until a power cycle. If booting without loading the module and loading it w= ith kldload manually, the screen goes blank and reboots after some time. In the latter case a crashdump is found at the next boot. Hardware is an Acer C720 Chromebook, using a Celeron 2955U. The graphics controller shows in pciconf -lv as "Haswell-ULT Integrated Graphics Controller". Kernel config is based on GENERIC, but with options WITNESS and WITNESS_SKIPSPIN added. I don't know much about debugging kernel dumps, but if someone tells me how= to do it I'm ready to try getting data out of the existing dump.
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