disc burner not working - possibly firmware issue

[sacerdos_daemonis]

I have not used my cd burner since before upgrading OpenBSD to 6.3. When I try to use it now there is a problem. Trying to burn a disc with cdrecord results in this error message:

cdrecord: Cannot allocate memory. WARNING: Cannot do mlockall(2).
cdrecord: WARNING: This causes a high risk for buffer underruns.
cdrecord: Cannot allocate memory. Cannot get mmap for 4198400 Bytes on /dev/zero.

Out of curiosity I installed k3b and it cannot detect the device. So I ran dmesg and noticed this part:

"INT3F0D" at acpi0 not configured
"MSFT0001" at acpi0 not configured
"SYN2B39" at acpi0 not configured
"VPC2004" at acpi0 not configured
acpibat0 at acpi0: BAT1 model "PABAS0241231" serial 41167 type Li-Ion oem "LENOVO "
acpiac0 at acpi0: AC unit online
acpibtn0 at acpi0: LID0
"PNP0C14" at acpi0 not configured
"MSFT0101" at acpi0 not configured
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: DD1F
cpu0: Enhanced SpeedStep 2694 MHz: speeds: 2301, 2300, 2200, 2100, 2000, 1800, 1700, 1500, 1400, 1300, 1100, 1000, 800, 700, 500, 400 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Core 6G Host" rev 0x08
inteldrm0 at pci0 dev 2 function 0 "Intel HD Graphics 520" rev 0x07
drm0 at inteldrm0
inteldrm0: msi
error: [drm:pid0:i915_firmware_load_error_print] *ERROR* failed to load firmware i915/skl_dmc_ver1.bin (-22)
error: [drm:pid0:i915_gem_init_hw] *ERROR* Failed to initialize GuC, error -8 (ignored)

I do not know if this is the cause. If so, is my guess correct that the problem is simply a failure to install the required firmware during the last upgrade?

Everything else has worked fine since the upgrade half a year ago, so I am reluctant to jump to conclusions regarding firmware. I am too ignorant to know if the error message and dmesg output are related. All I know for certain is that cdrecord "cannot allocate memory" and k3b cannot see the device. I am assuming it is not a problem with fstab since the device is the only internal drive and did not need special mounting before.