Date: Mon, 21 Aug 2023 10:44:28 -0700 From: Pete Wright <pete@nomadlogic.org> To: FreeBSD Current <freebsd-current@freebsd.org> Subject: kabylake + drm-515-kmod/drm-510-kmod hangs Message-ID: <76275772-a9c3-ed59-5fb3-47a13d2a69e6@nomadlogic.org>
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hey there, i've got a kabylake laptop that i've been using with drm-kmod for several years without much hassle. after upgrading to a new CURRENT this weekend I've found that when loading either the 510 or 515 drm-kmod kernel modules my system will hang. unfortunately i am not getting a panic or crash, the screen stops updating and i am unable to ping or SSH into the system. interestingly the capslock LED still toggles but doing a CTL+ALT+DEL does not seem to do anything useful and i have to manually power cycle. any tips for finding out what's going on? i've booted the system with verbose dmesg output, and loaded the module with "kldload -v" but do not get any useful output. here's the uname: FreeBSD colony 14.0-ALPHA2 FreeBSD 14.0-ALPHA2 amd64 1400096 #0 main-n264924-e2340276fc73: Sun Aug 20 21:28:44 PDT 2023 pete@colony:/usr/obj/usr/home/pete/git/freebsd/amd64.amd64/sys/GENERIC amd64 these are the log messages i see before the system locks up: Aug 21 10:40:34 colony kernel: iic0: <I2C generic I/O> on iicbus0 Aug 21 10:40:35 colony kernel: drmn0: <drmn> on vgapci0 Aug 21 10:40:35 colony kernel: vgapci0: child drmn0 requested pci_enable_io Aug 21 10:40:35 colony syslogd: last message repeated 1 times Aug 21 10:40:35 colony kernel: [drm] Unable to create a private tmpfs mount, hugepage support will be disabled(-19). Aug 21 10:40:35 colony kernel: [drm] Got stolen memory base 0x4b800000, size 0x4000000 Aug 21 10:40:35 colony kernel: lkpi_iic0: <LinuxKPI I2C> on drmn0 Aug 21 10:40:35 colony kernel: iicbus1: <Philips I2C bus> on lkpi_iic0 Aug 21 10:40:35 colony kernel: iic1: <I2C generic I/O> on iicbus1 Aug 21 10:40:35 colony kernel: lkpi_iic1: <LinuxKPI I2C> on drmn0 Aug 21 10:40:35 colony kernel: iicbus2: <Philips I2C bus> on lkpi_iic1 Aug 21 10:40:35 colony kernel: iic2: <I2C generic I/O> on iicbus2 Aug 21 10:40:35 colony kernel: lkpi_iic2: <LinuxKPI I2C> on drmn0 Aug 21 10:40:35 colony kernel: iicbus3: <Philips I2C bus> on lkpi_iic2 Aug 21 10:40:35 colony kernel: iic3: <I2C generic I/O> on iicbus3 Aug 21 10:40:35 colony kernel: lkpi_iic3: <LinuxKPI I2C> on drmn0 Aug 21 10:40:35 colony kernel: iicbus4: <Philips I2C bus> on lkpi_iic3 Aug 21 10:40:35 colony kernel: iic4: <I2C generic I/O> on iicbus4 cheers, -pete -- Pete Wright pete@nomadlogic.org @nomadlogicLA
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