Date: Tue, 28 Dec 2021 00:05:56 +0000 From: bugzilla-noreply@freebsd.org To: x11@FreeBSD.org Subject: [Bug 237544] graphics/drm-fbsd12.0-kmod: panic on 12-STABLE with Radeon HD 7450 (but not with drm-fbsd11.2-kmod) Message-ID: <bug-237544-7141-spQa4no6xI@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-237544-7141@https.bugs.freebsd.org/bugzilla/> References: <bug-237544-7141@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D237544 Bill Paul <noisetube@gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |noisetube@gmail.com --- Comment #6 from Bill Paul <noisetube@gmail.com> --- Unfortunately, this bug is still present, even using FreeBSD 12.3-RELEASE. Note that I have observed it with several Radeon cards, so it doesn't appear specific to a particular card. The same problem does not happen with the In= tel i915kms.ko driver from the same package. Based on the hint here, I created my own drm-fbsd11.2-kmod port (the origin= al has been deleted from the repo as obsolete) and massaged it a bit to compil= e on FreeBSD 12.3, and that version works without crashing. I suspect there is a locking problem somewhere in the drm or ttm modules in= the newer code. Sadly, nobody seems to care enough to fix it. (And I don't understand the code well enough to fix it myself. The differences between t= he 4.11 and 4.16 versions of the driver are substantial.) --=20 You are receiving this mail because: You are the assignee for the bug.=
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