Re: [gentoo-user] can't start X as user
Hi Philip,
My user is in 'tty wheel usb input video' (among others).
that shoud suffice.
You need to use '-keeptty' for xinit and preselect a TTY. For myself I
have put this into my bashrc and it works quite well:
xinit ()
{
local VT;
local DISPLAY;
VT=vt$(tty | sed 's/.*tty//');
DISPLAY=:$(pgrep -cf 'X.*keeptty.*vt');
/usr/bin/xinit -- $DISPLAY -keeptty -wr $VT
}
Cheers
Björn
Re: [gentoo-user] can't start X as user
On Thursday, 15 June 2023 03:21:29 BST Philip Webb wrote:
> 230614 Michael wrote:
> > On Wednesday, 14 June 2023 01:21:53 BST Philip Webb wrote:
> >> My new machine has no problem with graphics using System Rescue etc
> >> nor using 'startx' as root with Gentoo, but it refuses to start as user.
> >>
> >> I've had a series of errors :
> >> parse_vt_settings : can't open /dev/tty0 (permission denied)
> >>
> >> after adding my user to 'tty input' in 'group' :
> >> can't open virtual console 7 : permission denied
The startx command would launch a GUI in the same VT you are running startx in
- you will not have permission to launch a GUI in a console when you are not
logged in it.
> > Not sure if this is necessary:
> > $ grep 'tty|input' /etc/group
> > tty:x:5:
> > input:x:97:
> My user is in 'tty wheel usb input video' (among others).
I understand, but this is not necessary - unless you have some special
programs requiring your user to have direct access to devices/libraries/
whatever is controlled by these groups - e.g. on the PC I'm currently logged
in:
$ grep 'tty|wheel|usb|input|video' /etc/group
tty:x:5:
wheel:x:10:root,michael
video:x:27:root,michael,sddm
usb:x:85:pcscd
input:x:97:
> > The elogind service ought to be in boot runlevel according to the wiki:
> > https://wiki.gentoo.org/wiki/Elogind#Configuration
>
> I've corrected that & checked that Pam is running & Udev is in 'sysinit'.
"... Pam is running"?
Not sure what you mean here. Did you mean to say dbus is in the default run
level and running?
> >> 'xorg-server' has 'USE="elogind"'.
Good.
> >> In my current machine, there is a /dev/fb0 with permission 660 .
> >> but there is no such device in the new machine.
>
> Ditto for /dev/dri/card0 .
>
> > Have you followed this wiki page to configure your kernel,
> > include the appropriate firmware for your card(s),
> > set up INPUT_DEVICES & VIDEO_CARDS in make.conf,
> > emerged associated x11-base/xorg-drivers
> > and the x11-base/xorg-server packages before a reboot ?
> > https://wiki.gentoo.org/wiki/Xorg/Guide
>
> Yes. I have "evdev" + "radeon vesa" in 'make.conf'.
You need to recast an eye over the above Xorg Guide:
There is a kernel module EVDEV:
$ grep EVDEV /usr/src/linux/.config
CONFIG_INPUT_EVDEV=y
which should not be confused with the portage variable INPUT_DEVICES "evdev",
now superseded by "libinput":
$ portageq envvar INPUT_DEVICES
libinput
About half way down the page the recommended INPUT_DEVICES flags to use when
emerging x11-base/xorg-drivers are shown as:
INPUT_DEVICES="libinput ... -evdev".
Also, the radeon input device is meant for older radeon cards.
As is vesa.
> 'xf86-video-ati/vesa' are installed,
These would not be installed if you had configured your kernel correctly for
your current video card.
You should not need the vesa generic driver for a graphic framebuffer these
days:
$ grep FB_VESA /usr/src/linux/.config
# CONFIG_FB_VESA is not set
What you should be using instead is kernel mode setting (KMS), by setting it
up in the kernel as explained in this section:
https://wiki.gentoo.org/wiki/Xorg/Guide#Kernel_modesetting
As suggested in the above guide and depending on how new your card is, check
this page to adjust your kernel config and specify the necessary firmware
accordingly:
https://wiki.gentoo.org/wiki/AMDGPU
> as is 'xorg-server' + all its requirements ("dependencies").
> > There should be a fb0 device listed:
> > $ ls -l /dev/fb*
> > crw-rw 1 root video 29, 0 Jun 14 08:52 /dev/fb0
>
> ANB5 has /dev/fb0 /dev/dri/card0 with 660 permitions, ANB6 hasn't
> (those are my names for the present + new machines).
You need KMS and direct rendering configured in your kernel, which is why I
suspect your kernel requires more work as suggested above. Thereafter you'll
need to re-emerge xorg and mesa before your reboot to drag in the correct xf86
and mesa drivers.
[snip...]
> 230614 Jack wrote :
> > what does /var/log/Xorg.0.log show ?
>
> It has these errors (EE) in the X log file :
>
> Failed to load module "fbdev" (does not exist)
> Open /dev/dri/card0 : no such directory or file
> VESA (0) : cannot read int vect
> Screens found, but none has a useable configuration
>
> Do I need 'fbdev' or 'card0' ? Whatever is "int vect" ?
You're missing the appropriate graphics configuration in your kernel, hence
there's no direct rendering card0 available.
I think the "int vect" message is due to an old xorg-server bug, related to
keyboard hotkeys. Not relevant to your problem.
> When I try to 'startx' as user, the log file is in ~/.local/share/xorg ,
> which is also where it is in ANB5. When I try 'Xorg -configure',
> it produces nothing of use & dumps it in my home directory (ugh).
Normally, you should not need an Xorg config file these days, unless you have
special requirements and GUI desktop configuration menu cannot address these.
Very much a last resort.
> I can probably
Re: [gentoo-user] can't start X as user
230614 Michael wrote:
> On Wednesday, 14 June 2023 01:21:53 BST Philip Webb wrote:
>> My new machine has no problem with graphics using System Rescue etc
>> nor using 'startx' as root with Gentoo, but it refuses to start as user.
>> I've had a series of errors :
>> parse_vt_settings : can't open /dev/tty0 (permission denied)
>> after adding my user to 'tty input' in 'group' :
>> can't open virtual console 7 : permission denied
> Not sure if this is necessary:
>
> $ grep 'tty|input' /etc/group
> tty:x:5:
> input:x:97:
My user is in 'tty wheel usb input video' (among others).
> The elogind service ought to be in boot runlevel according to the wiki:
> https://wiki.gentoo.org/wiki/Elogind#Configuration
I've corrected that & checked that Pam is running & Udev is in 'sysinit'.
>> 'xorg-server' has 'USE="elogind"'.
>> In my current machine, there is a /dev/fb0 with permission 660 .
>> but there is no such device in the new machine.
Ditto for /dev/dri/card0 .
> Have you followed this wiki page to configure your kernel,
> include the appropriate firmware for your card(s),
> set up INPUT_DEVICES & VIDEO_CARDS in make.conf,
> emerged associated x11-base/xorg-drivers
> and the x11-base/xorg-server packages before a reboot ?
> https://wiki.gentoo.org/wiki/Xorg/Guide
Yes. I have "evdev" + "radeon vesa" in 'make.conf'.
'xf86-video-ati/vesa' are installed,
as is 'xorg-server' + all its requirements ("dependencies").
> There should be a fb0 device listed:
> $ ls -l /dev/fb*
> crw-rw 1 root video 29, 0 Jun 14 08:52 /dev/fb0
ANB5 has /dev/fb0 /dev/dri/card0 with 660 permitions, ANB6 hasn't
(those are my names for the present + new machines).
> You'll also need to have emerged a Desktop Environment
> or at least a window manager: https://wiki.gentoo.org/wiki/Window_manager
I've installed 'twm xterm' to test X for now.
I will install KDE for regular use later.
'.xinitrc' is
#xscreensaver &
numlockx
exec dbus-launch --exit-with-session /usr/bin/twm
ie the same as in ANB5, but substituting Twm for Plasma.
230614 Jack wrote :
> what does /var/log/Xorg.0.log show ?
It has these errors (EE) in the X log file :
Failed to load module "fbdev" (does not exist)
Open /dev/dri/card0 : no such directory or file
VESA (0) : cannot read int vect
Screens found, but none has a useable configuration
Do I need 'fbdev' or 'card0' ? Whatever is "int vect" ?
When I try to 'startx' as user, the log file is in ~/.local/share/xorg ,
which is also where it is in ANB5. When I try 'Xorg -configure',
it produces nothing of use & dumps it in my home directory (ugh).
I can probably cut the Gordian knot by emerging Xorg-server with 'suid'.
How insecure is that for a single-user system in a house ?
The Elogind approach has worked in ANB5 since Aug 2020.
I can't make much of a useful comparison between the 2 machines,
as ANB5 dates from 2015, ie long before the 'elogind' affair in 2020,
& it has Nvidia graphics, whereas ANB6 has cutting-edge AMD.
BTW System Rescue + Mint (live USB) load modules for AMDGPU,
which seems to be the latest graphics offering ;
I need to find some firmware to get it to work
(enabling AMDGPU in the kernel causes the boot process to stall
with a message re missing firmware).
There are in fact 2 graphics tools in ANB6,
one in the CPU (AMD), the other on the Mobo (Gigabyte).
How can I tell which one the machine is trying to use ?
I will continue to poke around, but further advice is very welcome.
Please read my comments above carefully (smile).
--
,,
SUPPORT ___//___, Philip Webb
ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto
TRANSIT`-O--O---' purslowatchassdotutorontodotca
Re: [gentoo-user] can't start X as user
On Wednesday, 14 June 2023 01:21:53 BST Philip Webb wrote: > My new machine has no problem with graphics using System Rescue etc > nor using 'startx' as root with Gentoo, but it refuses to start as user. > > I've had a series of errors : > > parse_vt_settings : can't open /dev/tty0 (permission denied) > > after adding my user to 'tty input' in 'group' : > > can't open virtual console 7 : permission denied Not sure if this is necessary: $ grep 'tty|input' /etc/group tty:x:5: input:x:97: > after adding 'elogind' to 'default' runlevel & starting it : > > xf86EnableIO : failed to enable I/O ports -03ff >(operation not permitted) The elogind service ought to be in boot runlevel according to the wiki: https://wiki.gentoo.org/wiki/Elogind#Configuration > yes, my user is in the 'video' group & 'xorg-server' has USE="elogind" . > > In my current machine, there is a /dev/fb0 with permission 660 . > but there is no such device in the new machine. Have you followed this wiki page to configure your kernel, include the appropriate firmware for your card(s), set up INPUT_DEVICES & VIDEO_CARDS in make.conf, emerge associated x11-base/xorg-drivers and the x11-base/xorg- server packages before a reboot? https://wiki.gentoo.org/wiki/Xorg/Guide There should be a fb0 device listed: $ ls -l /dev/fb* crw-rw 1 root video 29, 0 Jun 14 08:52 /dev/fb0 You'll also need to have emerged a Desktop Environment, or at least a window manager: https://wiki.gentoo.org/wiki/Window_manager Check the above wiki pages and post back with any queries and accompanying logs if things do not work as expected. signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] can't start X as user
On 6/13/23 20:21, Philip Webb wrote: My new machine has no problem with graphics using System Rescue etc nor using 'startx' as root with Gentoo, but it refuses to start as user. I've had a series of errors : parse_vt_settings : can't open /dev/tty0 (permission denied) after adding my user to 'tty input' in 'group' : can't open virtual console 7 : permission denied after adding 'elogind' to 'default' runlevel & starting it : xf86EnableIO : failed to enable I/O ports -03ff (operation not permitted) yes, my user is in the 'video' group & 'xorg-server' has USE="elogind" . In my current machine, there is a /dev/fb0 with permission 660 . but there is no such device in the new machine. I've looked at several "solved" cases of the same error messages, but they don't seem to help my problem. Can anyone offer possible solutions ? what does "ll /dev/tty*" show? I see lots of them, including 0, although I can't say which are relevant. It does seem odd if you don't have any. Have you compared kernel config on the machine that works and the one that doesn't? what does /var/log/Xorg.0.log show? It's likely to be more voluminous than output to console. what's in ~/.xinitrc? I don't actually suspect anything there, but it might be relevant. In my case, X is started on the same virtual console it is invoked from, but I don't remember where the change from always using 7 shows up in any config file. However, that does suggest some permission error MIGHT be relevant (but no guarantees.)
