Date: Thu, 3 Jan 2019 18:39:46 -0600 From: Kevin Zheng <kevinz5000@gmail.com> To: x11@FreeBSD.org Subject: GPU hang on ThinkPad T420 with drm-kmod on 12.0-RELEASE Message-ID: <d3c55331-8b70-c2f7-8772-97640fd4c8b6@gmail.com>
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Hi there, I don't know if anyone else has been having similar issues. On the ThinkPad T420 (i5-2540M, Sandybridge), the drm-kmod (drm-fbsd12.0-kmod-4.16.g20181215) hangs like this, infrequently, but often enough on GPU applications: [drm] GPU HANG: ecode 6:0:0x61f7fffd, in chrome [100694], reason: Hang on rcs0, action: reset drmn0: Resetting chip after gpu hang last message repeated 1 times drmn0: i915_reset_device timed out, cancelling all in-flight rendering. It doesn't just hang with Chromium, it hangs on other apps as well. Tricky thing is that things otherwise seem to work, and I haven't figured out how to reliably reproduce the hang. Particularly, https://wiki.freebsd.org/Graphics/Intel-GPU-Matrix claims that other people have working Ivy Bridge with drm-kmod; maybe that has to be drm-kmod-legacy until I figure out what's going on. Should I create a PR, or wait until I have more info? -- Kevin Zheng kevinz5000@gmail.com | kevinz@berkeley.edu | PGP: 0xC22E1090
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