Date: Sat, 2 Jul 2016 20:32:39 -0400 From: Anthony Jenkins <Scoobi_doo@yahoo.com> To: Pete Wright <pete@nomadlogic.org>, gljennjohn@gmail.com Cc: freebsd-x11@freebsd.org Subject: Re: Debugging System Lockup Message-ID: <c8b153c0-f716-5060-1cb0-3a5b848e041b@yahoo.com> In-Reply-To: <2bcdad95-e9f6-35bc-7af1-ecab3c3c335f@nomadlogic.org> References: <2893a3f4-7c49-85a0-1dd1-6c61e337c0db@nomadlogic.org> <20160701125303.35f2c59a@ernst.home> <2bcdad95-e9f6-35bc-7af1-ecab3c3c335f@nomadlogic.org>
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On 07/01/16 13:49, Pete Wright wrote: > On 07/01/2016 03:53, Gary Jennejohn wrote: >> On Thu, 30 Jun 2016 16:02:30 -0700 >> Pete Wright <pete@nomadlogic.org> wrote: >> >>> Hi All, >>> I've been working with mmacy on testing the new i915kms support on >>> skylake. I've got a stubborn bug where I am able to trigger a hard-lock >>> of my system requiring a manual power-off/power-on to get it back in >>> working order. Unfortunately, I have not been able to get any debugging >>> information out of this system when this happens - no core, backtrace in >>> dmesg buffer, etc. >>> >>> I was hoping someone on this list has had experience in debugging >>> situations like this and could offer some tips for trying to get useful >>> info out of this crash. I was going to configure my system to use >>> dcons(4) - but this system does not have a fireware device, so that >>> seems to rule out that avenue. So any input would be really appreciated! >>> >> Serial console? Should even work well enough using a FTDI adapter. > Unfortunately the system I am debugging only has USB - I investigated > using some of the advanced Intel SOL functionality on the system (it's a > Lenovo M900 Tiny micro-computer) but it requires windows to work. > > I did test using a usb->db9 serial adapter which was then connected to > may laptop (which also had a usb->db9 serial adapter) but that was > unsuccessful. > > cheers, > -pete I haven't actually tried this yet, but I recently purchased a PCIe serial port card from Amazon in hopes of tackling this exact problem with my serial-less laptop. I'll have to run it without the case, but (if it works) it's better than nothing. SIIG 2-Port Serial Mini PCIe with Power Board JJ-E20211-S1 https://www.amazon.com/gp/product/B008HSKJBM Anthony
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