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[88.105.96.80]) by smtp.gmail.com with ESMTPSA id i12sm13127059wry.57.2021.05.08.04.52.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 08 May 2021 04:52:53 -0700 (PDT) Subject: kld_list="drm" (was: i915kms kernel module causing freezes on FreeBSD 13.0-RELEASE) To: Matt K Cc: freebsd-questions@freebsd.org References: <68023ace-7338-5e39-28f9-22bf1ff78365@gmail.com> From: Graham Perrin Message-ID: <849f51ec-86a9-ccd8-8bde-175c27b15270@gmail.com> Date: Sat, 8 May 2021 12:52:52 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-GB X-Rspamd-Queue-Id: 4Fcm0R67bzz4nsf X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=gMm0BW0z; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of grahamperrin@gmail.com designates 2a00:1450:4864:20::334 as permitted sender) smtp.mailfrom=grahamperrin@gmail.com X-Spamd-Result: default: False [-3.79 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36:c]; FREEMAIL_FROM(0.00)[gmail.com]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; NEURAL_HAM_SHORT(-0.79)[-0.794]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; MID_RHS_MATCH_FROM(0.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[2a00:1450:4864:20::334:from]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; RECEIVED_SPAMHAUS_PBL(0.00)[88.105.96.80:received]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; SPAMHAUS_ZRD(0.00)[2a00:1450:4864:20::334:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::334:from]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-questions] Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Content-Filtered-By: Mailman/MimeDel 2.1.34 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 08 May 2021 11:52:57 -0000 On 08/05/2021 07:10, Matt K wrote: > On Sat, May 8, 2021 at 1:08 AM Graham Perrin > wrote: > > > Try a third approach: > > kld_list="drm" > > > This works. I will keep an eye on the system, logs, etc, and let you > know what I find. Now everything seems to be working as advertised. > With xf86-video-intel, even TearFree is working. > Where is this behavior documented? FreeBSD for Pretty Little Unicorns, 1st Edition. > How did you know about this solution? It came to me in a dream. Whispered by the ghost of Barbara Stanwyck, once the highest-paid woman in the United States and famed for movies such as 'Sorry, Wrong Number'. Lesser-known but no less valuable contributions to postmodern creative thinking include 'Sorry, Wrong Module'. > I think that this means that my problem is solved, but the question > remains: why does i915kms cause freezes when loaded from rc.conf and > works normally when loaded by hand? This is not handbook-documented > behavior. Nor is it consistent or transparent. Maybe not Intel-specific. I find kld_list="drm" less troublesome than kld_list="radeonkms" with Thames [Radeon HD 7550M/7570M/7650M] with SDDM. A recent probe: . My voyage of discovery spanned around three years. Maybe longer. A few flashbacks: (2018) I found kld_list="/boot/modules/radeonkms.ko" troublesome with FreeBSD 12.0-ALPHA7 (2018) "… toying with the possibility that … a specific load/start order might help." (2019) I found drm-legacy-kmod better than drm-current-kmod with 13.0-CURRENT (2020) kld_list="/boot/modules/drm.ko" worked for me, keyword:     peculiar Eventually I condensed the working peculiarity to kld_list="drm". More accurately (in context – SDDM, KDE Plasma and so on): line 17.