I still see this as a workaround though as I > Correct, there used to be CONFIG_RCU_NOCB_CPU_ALL until very recently. > With RCU_NOCB_CPU you need to have the following in the kernel command (In reply to James Le Cuirot from comment #13) I did enable gpu support in the Chrome again and system is not freezing while screenfetch Now uptime is 7 hours and 19 minutes and system looks stable. I thought it was usb 3.0 problem at first and moved my mouse to usb 2.0 port. X did freeze randomly when scrolling web content in the Chrome Beta browser. My Rybuild did hang randomly with Amd drm-next-4.15-wip kernel and mainline 4.14-rc1 and rc2 and 4.13.5 custom non debug 1000Hz timer kernels. I am using Gentoo but I have confirmed that this affects Debian. I believe we have not seen so many reports of this issue, partly because most users will not know how to get kernel output in this situation, and partly because Fedora's kernel already has CONFIG_RCU_NOCB_CPU enabled. I was facing that issue too and had my CPU replaced but while the segfaults have gone, both my original and the replacement exhibit these freezes. I must stress that this issue must be not confused with the segfault issue commonly reported with early Ryzens. I captured the last time with netconsole and admittedly the call trace was different but I've seen many reports of Ryzen freezes on a variety of motherboards and disabling C6 or enabling CONFIG_RCU_NOCB_CPU is always said to work around it.

Will revert patch 1fccb73011ea8a5fa0c6d357c33fa29c695139ea.Īre you sure? That commit concerns iTCO_wdt, which is an Intel driver? (In reply to Wim Van Sebroeck from comment #8)

Zenstates.py small patch to allow disabling only C6 packageĭmesg of freeze with 4.20.3 kernel and nomwait, rcu_nocbs, max_cstate appliedĭmesg log after rebooting with acpi-dump-cstates patchĭmesg w/o boot parameter idle=halt, patched acpi-dump-cstatesĪdd rifw kernel parameter to test a couple of patch to workaround ryzen freezes Workaround init script (derived from zenstates.py)

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