Failed to Obtain File Descriptor for DRM Device

[mirkobrombin]

While debugging an issue with the cosmic-greeter through the Pop Chat, we encountered the following error in the journal:

Failed to add device /dev/dri/card1: Failed to obtain file descriptor for drm device: /dev/dri/card1
Caused by:
    Failed to open device: Resource temporarily unavailable (os error 11)

Extended journal

Jan 24 09:24:34 vos cosmic-comp[22293]: Failed to add device /dev/dri/card1: Failed to optain file descriptor for drm device: /dev/dri/card1

                                        Caused by:
                                            Failed to open device: Resource temporarily unavailable (os error 11)

                                        Stack backtrace:
                                           0: <unknown>
                                           1: <unknown>
                                           2: <unknown>
                                           3: <unknown>
                                           4: <unknown>
                                           5: __libc_start_call_main
                                                     at ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
                                           6: __libc_start_main_impl
                                                     at ./csu/../csu/libc-start.c:360:3
                                           7: <unknown>
Jan 24 09:24:54 vos cosmic-comp[22293]: [GL] GL_INVALID_VALUE in glTexSubImage2D(xoffset 0 + width 24 > 10)
Jan 24 09:24:55 vos cosmic-comp[22293]: [GL] GL_INVALID_VALUE in glTexSubImage2D(xoffset 0 + width 24 > 10)
Jan 24 09:24:58 vos cosmic-comp[22293]: [GL] GL_INVALID_VALUE in glTexSubImage2D(xoffset 0 + width 24 > 15)
Jan 24 09:24:59 vos cosmic-comp[22293]: [GL] GL_INVALID_VALUE in glTexSubImage2D(xoffset 0 + width 24 > 10)
Jan 24 09:25:33 vos cosmic-comp[22293]: [GL] GL_INVALID_VALUE in glTexSubImage2D(xoffset 0 + width 24 > 10)
Jan 24 09:25:36 vos cosmic-comp[22293]: [GL] GL_INVALID_VALUE in glTexSubImage2D(xoffset 0 + width 15 > 10)
Jan 24 09:40:19 vos cosmic-comp[22293]: Client bug: Unable to re-configure repositioned popup.

Specs

[Drakulix]

Possibly related to #1172