Date: Thu, 23 Jun 2022 09:43:08 +0200 From: Cejka Rudolf <cejkar@fit.vutbr.cz> To: Emmanuel Vadot <manu@bidouilliste.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Reasons for keeping sc(4) and libvgl ? Message-ID: <YrQZjFaxkXW5sE4d@fit.vut.cz> In-Reply-To: <YaSV2CeuWWsMjy33@fit.vutbr.cz> References: <20211126160454.3eb827365a02103169ab9adc@bidouilliste.com> <YaSV2CeuWWsMjy33@fit.vutbr.cz>
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Hello, so is there any solution for problem below now? Cejka Rudolf wrote (2021/11/29): > Hello, > I have one problem or two with VT in FreeBSD 12. I wrote a question in > freebsd-stable what to do, but without response, so I still have to > use SC. Please, could you look at it? There is not configured device > /dev/console without monitor after upgrade from 11 to 12 and device > /dev/kbdmux0 is busy using VT but not with SC. > > Subject: Unable to grab keyboard with VT on a headless node in stable/12 > > Hello, > I have a headless node without monitor and without keyboard. There > is just network and USB card reader in keyboard mode. > > In stable/11, there was no problem to disconnect USB card reader > from kbdmux using kbdcontrol -A ukbd0 < /dev/console and open > /dev/ukbd0 in a program. > > However, under stable/12 it works just with connected monitor. > > Without monitor, there is an error: > > # kbdcontrol < /dev/console > -bash: /dev/console: Device not configured > > Furthermore with default VT, it is also impossible to use /dev/kbdmux0: > > # kbdcontrol < /dev/kbdmux0 > -bash: /dev/kbdmux0: Device busy > > I have found a workaround using SC, where it is possible to atleast > open /dev/kbdmux0 and use kbdcontrol -A ukbd0 < /dev/kbdmux0, but why > keyboard operation is now dependend on connected monitor? And why VT > does not allow to open /dev/kbdmux0? > > Thank you. -- Rudolf Cejka <cejkar at fit.vut.cz> https://www.fit.vut.cz/~cejkar Brno University of Technology, Faculty of Information Technology Bozetechova 1/2, 612 00 Brno, Czech Republic
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