Valve Adds CD-ROM Driver Support to Steam Frame Kernel

Valve added three CD-ROM kernel modules to Steam Frame. VR.org News reports that the change may let the headset detect and read an optical drive after a SteamOS build containing it ships, but Valve has not announced a release date.

Three modules added

The change adds CONFIG_CDROM=m, CONFIG_BLK_DEV_SR=m and CONFIG_CHR_DEV_SG=m to arch/arm64/configs/gabe_defconfig, the file used to configure the kernel Valve builds SteamOS from for Steam Frame. All three use m, so they build as loadable modules rather than directly into the kernel.

VR.org News reports that two lines marking CONFIG_BLK_DEV_SR and CONFIG_CHR_DEV_SG as unset were also removed. Commit b68e4a1 was authored by Valve’s Gabe Rowe. Its message says: “gabe_defconfig: add support for cdrom drives for parity with steamdeck/machine.”

BLK_DEV_SR is the SCSI CD-ROM block driver used when a USB optical drive presents itself as a SCSI device. CHR_DEV_SG provides generic SCSI pass-through support. CONFIG_CDROM supplies the common CD-ROM layer used by the sr driver.

Request and Valve response

According to VR.org News, a user posting as Aiodensghost opened a Steam Frame General Discussions thread on October 18 at 9:19am Pacific. The thread was titled “Why can't I use my detachable disc drive?” The user wanted to watch a movie on the road and install the 2006 PC copy of Need for Speed Carbon they still own. The post ended: “May I PLEASE have the ability to use an optical drive?”

Gabe Rowe replied the next afternoon at 12:43pm Pacific, posting as gaberowe under a Valve developer tag. The complete reply was: “we will look into this thanks for alerting us.” VR.org News reports that the reply is stamped 19:43:01 UTC and commit b68e4a1 followed at 19:51:54 UTC, a gap of 8 minutes and 53 seconds. The author and committer dates match, so the commit was not rebased onto that later time.

Tom’s Hardware first spotted the change on October 24 and described the gap as under ten minutes. PC Gamer followed two days later. VR.org News published its report on 2026-10-28.

What support does not provide

The modules should let Steam Frame see a drive and read data from a disc. They do not add software for DVD or Blu-ray playback, and they do not provide decryption for those discs. The kernel change also does not increase USB power delivery.

Valve’s specification lists the rear USB-C port for charging and data but gives it no output rating. The only published accessory power budget belongs to the nose bridge expansion port: 3.1 volts at up to 2 amps, or roughly 6 watts. A disc drive does not connect to that port.

A drive with its own power supply should mount once a SteamOS build containing the change reaches headsets. A bus-powered drive remains uncertain. Reading disc data should work, but watching a film still requires playback software Steam Frame does not ship. Commercial DVDs and Blu-rays remain encrypted.

Need for Speed Carbon is also unresolved. Its retail PC disc uses SafeDisc copy protection, and the game would need to run through Proton and FEX on an ARM chip. Nobody has shown that working on Steam Frame.

Kernel branch, not released feature

The change remains on a kernel branch. It reaches headsets only when Valve ships a SteamOS build made from that branch, and Valve has given no date.

The commit appears on an unofficial GitHub mirror set up on October 17. Its predecessor, the mirror that gave up the Plano OLED panel driver two weeks earlier, remains online but no longer carries the full tree. Valve publishes Steam Frame’s kernel source, while the mirror exposes individual commits.

VR.org News reports that the original poster addressed the power issue on October 25, writing, “Valve adding driver support to the kernel is good enough for me.” The user was shopping for a USB hub able to power the drive and pass its data through at the same time because the 60W hub tried first was not enough.