Re: F42/Xfce - KVM monitor not waking up
Javier Perez <[email protected]> Mon, 3 Aug 2026 23:45:51 -0500
| Newsgroups | gmane.linux.redhat.fedora.general |
|---|---|
| Message-ID | <CAPoh9iTPx0Csiag91qQBwTUAcwrU3c8zz9RKiLr5AB-+yCVwyA@mail.gmail.com> |
--===============8692962252926255098== Content-Type: multipart/alternative; boundary="000000000000f7cdd206583154e3" --000000000000f7cdd206583154e3 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sat, Aug 1, 2026 at 2:06=E2=80=AFAM Tim via users <[email protected]= ject.org> wrote: > Robert Moskowitz: > > > If I am away from my system, and it turns off the monitor, the KVM > > > monitor does not wake up on activating the notebook. > > > > > > ...[snip more about how it works for Windows but not for Fedora]... > > Tim: > > As a very basic thing: Have you swapped monitor HDMI video cables? > > > > A bad cable, or damaged socket on a monitor, *could* be a problem for > > monitor wake-up, monitor detection, mode selection, etc. > > And apparently some cables fail at HDMI v2 but are fine with HDMI v1. > > Another point: Does your monitor have multiple inputs and auto input > scanning? > > Two of mine do (both different), and with loss of signal they go > scanning through all inputs once or twice, and *park* themselves at the > last input. If, later on, input 1 comes to life, it never notices it. > Unfortunately I can't connect the PC to the last input, it's the wrong > type of video signal. It's also next to impossible to get the monitor > to switch on for you to manually change inputs when it's in that state. > So I switched off input hunting. > > -- > > uname -rsvp > Linux 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 > x86_64 > (yes, this is the output from uname for this PC when I posted) > > Boilerplate: All unexpected mail to my mailbox is automatically deleted. > I will only get to see the messages that are posted to the mailing list. > > > I wonder, does your KVM have EDID emulation? I used to have a KVM without it and it was a lot of additional steps I had to make each time I switch systems. My current one has it and it is a blessing, because the KVM lies to each connected system telling them that the monitor is still connected. Maybe that would help you out JP > -- > _______________________________________________ > users mailing list -- [email protected] > To unsubscribe send an email to [email protected] > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/[email protected]= rg > Do not reply to spam, report it: > https://forge.fedoraproject.org/infra/tickets/issues/new > --=20 ------------------------------ /\_/\ |O O| [email protected] ~~~~ Javier Perez ~~~~ While the night runs ~~~~ toward the day... m m Pepebuho watches from his high perch. --000000000000f7cdd206583154e3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div dir=3D"ltr"></div><br><div class=3D"gmail_quote gmail= _quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Sat, Aug 1, 2026= at 2:06=E2=80=AFAM Tim via users <<a href=3D"mailto:[email protected]= roject.org">[email protected]</a>> wrote:<br></div><blockquo= te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px = solid rgb(204,204,204);padding-left:1ex">Robert Moskowitz:<br> > > If I am away from my system, and it turns off the monitor, the KV= M <br> > > monitor does not wake up on activating the notebook.<br> > > <br> > > ...[snip more about how it works for Windows but not for Fedora].= ..<br> <br> Tim:<br> > As a very basic thing:=C2=A0 Have you swapped monitor HDMI video cable= s?<br> > <br> > A bad cable, or damaged socket on a monitor, *could* be a problem for<= br> > monitor wake-up, monitor detection, mode selection, etc.<br> <br> And apparently some cables fail at HDMI v2 but are fine with HDMI v1.<br> <br> Another point:=C2=A0 Does your monitor have multiple inputs and auto input<= br> scanning?<br> <br> Two of mine do (both different), and with loss of signal they go<br> scanning through all inputs once or twice, and *park* themselves at the<br> last input.=C2=A0 If, later on, input 1 comes to life, it never notices it.= <br> Unfortunately I can't connect the PC to the last input, it's the wr= ong<br> type of video signal.=C2=A0 It's also next to impossible to get the mon= itor<br> to switch on for you to manually change inputs when it's in that state.= <br> So I switched off input hunting.<br> <br> -- <br> <br> uname -rsvp<br> Linux 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 x86_6= 4<br> (yes, this is the output from uname for this PC when I posted)<br> <br> Boilerplate:=C2=A0 All unexpected mail to my mailbox is automatically delet= ed.<br> I will only get to see the messages that are posted to the mailing list.<br= > <br> <br></blockquote><div>I wonder, does your KVM have EDID emulation?=C2=A0</d= iv><div>I used to have a KVM without it and it was a lot of additional step= s I had to make each time I switch systems.=C2=A0</div><div>My current one = has it and it is a blessing, because the KVM lies to each connected system = telling them that the monitor is still connected.</div><div>Maybe that woul= d help you out=C2=A0</div><div><br></div><div>JP</div><div>=C2=A0</div><blo= ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left= :1px solid rgb(204,204,204);padding-left:1ex"> -- <br> _______________________________________________<br> users mailing list -- <a href=3D"mailto:[email protected]" targ= et=3D"_blank">[email protected]</a><br> To unsubscribe send an email to <a href=3D"mailto:[email protected]= roject.org" target=3D"_blank">[email protected]</a><br> Fedora Code of Conduct: <a href=3D"https://docs.fedoraproject.org/en-US/pro= ject/code-of-conduct/" rel=3D"noreferrer" target=3D"_blank">https://docs.fe= doraproject.org/en-US/project/code-of-conduct/</a><br> List Guidelines: <a href=3D"https://fedoraproject.org/wiki/Mailing_list_gui= delines" rel=3D"noreferrer" target=3D"_blank">https://fedoraproject.org/wik= i/Mailing_list_guidelines</a><br> List Archives: <a href=3D"https://lists.fedoraproject.org/archives/list/use= [email protected]" rel=3D"noreferrer" target=3D"_blank">https://li= sts.fedoraproject.org/archives/list/[email protected]</a><br> Do not reply to spam, report it: <a href=3D"https://forge.fedoraproject.org= /infra/tickets/issues/new" rel=3D"noreferrer" target=3D"_blank">https://for= ge.fedoraproject.org/infra/tickets/issues/new</a><br> </blockquote></div><div><br clear=3D"all"></div><br><span class=3D"gmail_si= gnature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_signature">--= ----------------------------<br>=C2=A0/\_/\=C2=A0=C2=A0 <br>=C2=A0|O O|=C2= =A0 <a href=3D"mailto:[email protected]" target=3D"_blank">pepebuho@gmail.= com</a><br>=C2=A0~~~~ =C2=A0 =C2=A0 Javier Perez<br>=C2=A0~~~~=C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 While the night runs<br>=C2=A0~~~~=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 toward the day...<br>=C2=A0 m m=C2=A0=C2=A0 =C2=A0 =C2=A0= Pepebuho watches <br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0 =C2= =A0=C2=A0 from his high perch. </div></div> --000000000000f7cdd206583154e3-- --===============8692962252926255098== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline LS0gCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCnVzZXJz IG1haWxpbmcgbGlzdCAtLSB1c2Vyc0BsaXN0cy5mZWRvcmFwcm9qZWN0Lm9yZwpUbyB1bnN1YnNj cmliZSBzZW5kIGFuIGVtYWlsIHRvIHVzZXJzLWxlYXZlQGxpc3RzLmZlZG9yYXByb2plY3Qub3Jn CkZlZG9yYSBDb2RlIG9mIENvbmR1Y3Q6IGh0dHBzOi8vZG9jcy5mZWRvcmFwcm9qZWN0Lm9yZy9l bi1VUy9wcm9qZWN0L2NvZGUtb2YtY29uZHVjdC8KTGlzdCBHdWlkZWxpbmVzOiBodHRwczovL2Zl ZG9yYXByb2plY3Qub3JnL3dpa2kvTWFpbGluZ19saXN0X2d1aWRlbGluZXMKTGlzdCBBcmNoaXZl czogaHR0cHM6Ly9saXN0cy5mZWRvcmFwcm9qZWN0Lm9yZy9hcmNoaXZlcy9saXN0L3VzZXJzQGxp c3RzLmZlZG9yYXByb2plY3Qub3JnCkRvIG5vdCByZXBseSB0byBzcGFtLCByZXBvcnQgaXQ6IGh0 dHBzOi8vZm9yZ2UuZmVkb3JhcHJvamVjdC5vcmcvaW5mcmEvdGlja2V0cy9pc3N1ZXMvbmV3Cg== 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