Intel Arc B390 Gains 12% Performance on Linux 7.2 Kernel

Intel's Arc B390 graphics are getting a noticeable speed boost from the upcoming Linux 7.2 kernel, which matters for anyone running Panther Lake hardware on Linux. We see up to a 12 percent performance increase in specific gaming benchmarks compared to the previous Linux 7.1 release. This update means users can expect better frame rates without needing new hardware or changing their operating system setup. The gains come from driver optimizations rather than silicon changes, offering a free performance lift for existing owners.

Kernel driver updates deliver free performance lift without battery penalty

The testing focused on the Intel Arc B390 integrated graphics found in Panther Lake processors. We ran benchmarks on an MSI Prestige 14 Flip AI+ laptop equipped with an Intel Core Ultra X7 358H processor. The system used Ubuntu 26.04 LTS with Mesa 26.0.3 and a consistent kernel configuration for both Linux 7.1 and Linux 7.2 dev builds. This setup isolates the kernel driver changes as the primary variable affecting performance results.

• Test Platform: MSI Prestige 14 Flip AI+ with Intel Core Ultra X7 358H
• OS/Driver Environment: Ubuntu 26.04 LTS, Mesa 26.0.3, Linux 7.1 vs Linux 7.2 dev build
• Benchmark Results (Unvanquished): ~12% gain at 1920×1200 medium, ~6% at high
• Benchmark Results (Xonotic): 5% to 6.7% gain
• Benchmark Results (GravityMark): ~1% gain in Vulkan ray tracing

Benchmark results show varied improvements depending on the game and graphics settings. Unvanquished saw the largest gain at around 12 percent with medium settings at 1920×1200 resolution, while high settings yielded a 6 percent increase. Xonotic performance improved by between 5 and 6.7 percent across different graphics presets. GravityMark's Vulkan ray tracing test showed only a minimal 1 percent gain, indicating that ray tracing workloads benefit less from this update.

Power efficiency remains a key factor for mobile hardware, and the kernel update does not appear to increase energy consumption. SoC power draw stayed nearly identical between the Linux 7.1 and Linux 7.2 tests. This stability suggests that the performance gains will not reduce battery life on Panther Lake laptops or gaming handhelds. Phoronix noted that performance remained lower than expected in some other workloads, so results may vary by application.

We looked at the last Intel Arc B390 update earlier while tracking Panther Lake developments. The Linux 7.2 kernel is expected to stabilize in late August and become the default for Ubuntu 26.10. Users on Ubuntu or other Linux distributions can expect these driver improvements to arrive automatically with the next major release. This provides a practical path to better graphics performance without manual intervention.