Switching VT doesn't change video mode

Malvineous · 2017-04-13 22:54:15

Hi all,

I have noticed that since the last month or two when I press Alt+Ctrl+F2 to switch to another VT while I am in X, the video mode doesn't change. The screen simply displays the X session (minus the cursor) as if the VT has changed but the video card hasn't updated the mode.

I can log in blind on the other VT and then start an X session where the screen will then update, and switching back and forth between VTs (now both are running X) works fine. But switching to a VT that doesn't have X on it yet just causes the screen to freeze, showing whatever was on it at the moment the key combo was pressed.

I'm using the normal Intel drivers, not using xf86-video-intel, just KMS etc.

Does anyone else see this behaviour, whether using Intel hardware or not? I'm trying to work out whether it's a bug in Intel's video drivers or whether it's a kernel bug that affects all cards using KMS.

jasonwryan · 2017-04-13 22:55:59

Kernel version? Video card?

Native modesetting works fine for me...

Malvineous · 2017-04-13 23:05:03

So if you're in X on VT 1 and you press Alt+Ctrl+F2 to jump to VT 2, you are presented with the old-style text user/password login? Do you have xf86-video-intel installed or are you using the kernel's driver?

I'm running 4.10.8-1-ARCH but like I say it's been happening for a few months now. Onboard Intel HD 4600 - I think they are all much the same from the mode setting point of view though.

jasonwryan · 2017-04-13 23:06:44

Native modesetting, and yes switching VTs works as expected. This is on 4.10.10, but it also worked on -8 and -9

Arch Linux

#1 2017-04-13 22:54:15

Switching VT doesn't change video mode

#2 2017-04-13 22:55:59

Re: Switching VT doesn't change video mode

#3 2017-04-13 23:05:03

Re: Switching VT doesn't change video mode

#4 2017-04-13 23:06:44

Re: Switching VT doesn't change video mode

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