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

[Michael Mol]

On Thu, Jan 31, 2013 at 8:47 AM, Michael Mol <mikemol@×××××.com> wrote:
> On Thu, Jan 31, 2013 at 8:26 AM, Michael Mol <mikemol@×××××.com> wrote:
>> 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.
>
> Hm. Some googling suggests this might be a permissions issue.
>
> I do have consolekit enabled, but I'm using gdm, so I'd expect that to
> take care of itself. (Although screen fails to launch from vt1, so
> it's not a consolekit problem.)

OK, it looks like /dev/pts is not mounted. But darned if I know
why...Isn't udev supposed to handle that?

--
:wq