The graphics chip is probably relevant. FWIW I can't Ctrl-Alt-Fn to
any Virtual Console (I just get a black screen, no login prompt). I
have a nVidia graphics chip. There are many reports on the Internet of
trouble with VC and nVidia and some other graphics chips.
Cheers,
Cliff
On Fri, Mar 22, 2013 at 2:52 AM, Robert Heller <heller@xxxxxxxxxxxx> wrote:
> OK, some more information:
>
> I rebooted to a non-xen kernel (2.6.18-348.1.1.el5), and the problem
> remains, so it is not xen or a xen kernel issue. The machine has an AMD
> 64-bit processor (AMD Sempron(tm) Processor LE-1300), if that makes any
> difference. I have a LD450 keyboard (DEC VT220 flavored ps2 keyboard).
> The keyboard does work: the X server properly intercepts Ctrl-Alt-Fn and
> does a proper chvt call. The *kernel* itself is not handling
> Ctrl-Alt-Fn. (It is handling Ctrl-Alt-Delete, but I suspect that is
> something completely different.)
>
> My 32-bit laptop, running kernel 2.6.18-348.1.1.el5 is working just fine
> -- the kernel there is properly handling Ctrl-Alt-Fn and switches
> between consoles without problems.
>
> Oh, both machines boot to runlevel 3 and I use startx to fire up X (I
> loath graphical logins).
>
> At Wed, 20 Mar 2013 13:26:14 -0400 CentOS mailing list <centos@xxxxxxxxxx> wrote:
>
>>
>> I am not sure what I did, but for some reason Ctrl-Alt-F? bindings are
>> broken on 64-bit xen desktop machine (but not on my laptop (32-bit, no
>> xen)). Both machines are (mostly) up-to-date and running CentOS 5.9.
>> I rarely hop to different Virtual Consoles (eg Ctrl-Alt-F1 ...
>> Ctrl-Alt-F7), but today I wanted to go to the main console to watch
>> some kernel verbage (I was checking something with hot-swap SATA disk).
>> I discovered that I could not switch back to my X11 session
>> (Ctrl-Alt-F7)! I did some googling, but did not find anything. So far
>> as I can tell, I can switch to one of the other VT (Ctrl-Alt-Fn) *from*
>> VT7 (my X11 session), but cannot then switch to any other VT from
>> there, using the Ctrl-Alt-F? key bindings. The chvt command works, but
>> the keybindings don't. It is most strange. I know this used to work
>> (and still does work just fine on my laptop, running much the same
>> system, including the same X11 configuration, with the same desktop
>> setup (plain fvwm in MWM compatibity mode, same keybindings, etc.).
>> Other than different video cards (and thus different X11 drivers) and
>> 32-bit vs 64-bit and with xen virtualization on the 64-bit desktop box,
>> the system setups are virtually identical.
>>
>
> --
> Robert Heller -- 978-544-6933 / heller@xxxxxxxxxxxx
> Deepwoods Software -- http://www.deepsoft.com/
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>
>
>
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