If the X didn't crash with the command in step 2, you will be able to see error message in the termnial:
X Error of failed request: BadAlloc (insufficient resources for operation)
Major opcode of failed request: 151 (XVideo)
Minor opcode of failed request: 19 ()
Serial number of failed request: 51
Current serial number in output stream: 52
And these issues only happen on discrete AMD GPU with fglrx, can't be reproduced on the Intel GPU.
For more early-stage research before filing this bug please refer to bug 1505606
If the X didn't crash with the command in step 2, you will be able to see error message in the termnial:
X Error of failed request: BadAlloc (insufficient resources for operation)
Major opcode of failed request: 151 (XVideo)
Minor opcode of failed request: 19 ()
Serial number of failed request: 51
Current serial number in output stream: 52
And these issues only happen on discrete AMD GPU with fglrx, can't be reproduced on the Intel GPU.
For more early-stage research before filing this bug please refer to bug 1505606