Re: [gentoo-user] udev-191 bit me. Insufficient ptys

[Michael Mol]

On Wed, Jan 30, 2013 at 11:48 PM, Canek Peláez Valdés <caneko@×××××.com> wrote:
> On Wed, Jan 30, 2013 at 10:45 PM, Canek Peláez Valdés <caneko@×××××.com> wrote:
>> On Wed, Jan 30, 2013 at 9:35 PM, Michael Mol <mikemol@×××××.com> wrote:
>>> So, I botched the upgrade to udev-191. I thought I'd followed the
>>> steps, but I apparently only covered them for one machine, not both.
>>>
>>> The news item instructions specified that I had to remove
>>> udev-postmount from my runlevels. I didn't have udev-postmount in my
>>> runlevels, so I didn't remove it. Turns out, that dictum also applies
>>> to udev-mount. So after removing that[1], I was able to at least boot
>>> again.
>>>
>>> Udev also complained about DEVTMPFS not being enabled in the
>>> kernel.[2]  I couldn't get into X, but I could log in via getty and a
>>> plain old vt, so I enabled it, rebuilt the kernel, installed it and
>>> rebooted...and now that's presumably covered.
>>>
>>> I'm now able to get into X, but when I try to run an xterm, it fails.
>>> Checking ~/.xsession_errors, I find:
>>>
>>> xterm: Error 32, error 2: No such file or directory
>>> Reason: get_pty: not enough ptys
>>
>> Do you have CONFIG_LEGACY_PTYS=y?  If so, do you really need it? A
>> little over a year ago[1] I had an annoying issue for having that
>> option enabled in my kernel, with a lot of virtual ttys reported in
>> systemctl. This is a shot in the dark (I really don't know if it's
>> related to your problem), but perhaps having the LEGACY_PTYS option
>> enabled somehow depleted your available pseudo terminals (which any X
>> terminal needs to run)? I suppose screen is also out of the question
>> for the same reason.

No, I don't have CONFIG_LEGACY_PTYs. I do have UNIX98 PTYs, and I
tried enabling alternate namespaces, but that didn't help either.

>
> Also related, if you have LEGACY_PTYS:
>
> "LEGACY_PTY_COUNT:
>
> The maximum number of legacy PTYs that can be used at any one time.
> The default is 256, and should be more than enough.  Embedded
> systems may want to reduce this to save memory.
>
> When not in use, each legacy PTY occupies 12 bytes on 32-bit
> architectures and 24 bytes on 64-bit architectures."

Yeah, I'm not using CONFIG_LEGACY_PTY, so LEGACY_PTY_COUNT doesn't
even make itself available in menuconfig.

--
:wq