Users of AMD's latest RDNA4 graphics cards have little reason to chase bleeding-edge driver builds, according to benchmarks published by Phoronix this week. Testing with the newly launched Radeon RX 9070 GRE and the RX 9070 XT showed that Ubuntu 26.04's default driver stack — Linux kernel 7.0 built on Mesa 26.0 — delivers performance that is already close to what the newer Linux 7.1 kernel and Mesa 26.1 release can offer.
Marginal Gains on the Latest Stack
Phoronix conducted its RX 9070 GRE launch-day review using Ubuntu 26.04's shipped drivers, noting that the card worked without issues out of the box. To satisfy curiosity about potential upside from newer software, the publication then ran a comparative suite using the in-development Linux 7.1 kernel alongside Mesa 26.1, which includes the RadeonSI OpenGL and RADV Vulkan drivers.
The results showed only minor performance differences between the two configurations. Across the tested workloads, the newer driver combination did not deliver gains substantial enough to warrant an upgrade for most users, according to the benchmarks.
A Sign of Driver Maturity
The finding is arguably more noteworthy for what it signals about the state of AMD's open-source Linux graphics stack than for the numbers themselves. When a freshly released distribution ships a driver stack that already extracts near-optimal performance from brand-new hardware on launch day, it reflects years of upstream development work paying off.
AMD's RDNA4 architecture has benefited from early and continuous open-source development, with code for new GPU families typically landing in the Linux kernel and Mesa well ahead of retail availability. The narrow gap between Ubuntu 26.04's defaults and the latest development branches suggests that the driver ecosystem is now catching hardware at or near launch maturity — a significant milestone for the Linux desktop graphics story.
Why You Might Still Update
That said, raw frame rates are not the only reason to run newer drivers. Linux 7.1 and Mesa 26.1 bring bug fixes, expanded Vulkan extension support, and broader compatibility improvements that may matter depending on a user's workload. For developers targeting Vulkan or relying on specific extensions, staying current with Mesa releases can still be important regardless of benchmark deltas.
Additionally, users running non-Ubuntu distributions that ship older driver stacks by default may see more meaningful improvements when stepping up to kernel 7.1 and Mesa 26.1, since their baseline could be further behind.
The Bottom Line
For Linux users running AMD's newest RDNA4 cards on Ubuntu 26.04, the default configuration is already performing well. The days of needing to manually compile or backport newer Mesa and kernel builds to get acceptable GPU performance on fresh hardware appear to be fading — at least for AMD's open-source stack. That is welcome news for the broader Linux gaming and workstation community, and a testament to the maturity of upstream driver development.
Source: Phoronix
根據 Phoronix 本週發佈的基準測試，AMD 最新 RDNA4 顯示卡的用戶幾乎沒有必要追求最新的開發版驅動程式。使用新推出的 Radeon RX 9070 GRE 和 RX 9070 XT 進行的測試顯示，Ubuntu 26.04 預設的驅動程式組合——建基於 Mesa 26.0 的 Linux 核心 7.0——所提供的效能，已接近較新的 Linux 核心 7.1 和 Mesa 26.1 版本能提供的水平。
最新組合僅帶來微幅提升
Phoronix 在評測 RX 9070 GRE 首發日時，使用了 Ubuntu 26.04 隨附的驅動程式，並指出該顯示卡開箱即用，運作毫無問題。為了滿足對較新軟件潛在效能提升的好奇心，該出版物隨後使用開發中的 Linux 核心 7.1 以及包含 RadeonSI OpenGL 和 RADV Vulkan 驅動程式的 Mesa 26.1 進行了對比測試。
結果顯示兩種配置之間的效能差異甚微。根據基準測試，在所有測試的工作負載中，較新的驅動程式組合並未帶來足以讓大多數用戶值得進行升級的實質性收益。
驅動程式成熟的標誌
比起數字本身，這個發現更值得注意的，或許是它對於 AMD 開源 Linux 顯示卡驅動程式堆疊成熟度的意義。當一個新發行的作業系統隨附的驅動程式組合，能在首發日就從全新硬體中榨取接近最佳的效能，這反映出多年上游開發工作的成果。
AMD 的 RDNA4 架構受益於早期且持續的開源開發，新 GPU 系列的代碼通常在零售上市前很久就已進入 Linux 核心和 Mesa。Ubuntu 26.04 預設版本與最新開發分支之間的微小差距表明，驅動程式生態系統現在能在硬體上市時或接近上市時達到成熟——這是 Linux 桌面顯示卡發展歷程中的一個重要里程碑。
為何您可能仍想更新
話雖如此，原始幀率並非使用較新驅動程式的唯一原因。Linux 核心 7.1 和 Mesa 26.1 帶來了錯誤修復、擴展的 Vulkan 擴展支援以及更廣泛的兼容性改進，這些對於某些用戶的工作負載可能很重要。對於以 Vulkan 為目標或依賴特定擴展的開發者而言，無論基準測試差異如何，緊隨 Mesa 版本更新可能仍然重要。
此外，使用預設隨附較舊驅動程式組合的非 Ubuntu 發行版的用戶，在升級至核心 7.1 和 Mesa 26.1 時，可能會看到更顯著的改進，因為他們的基準線可能更為落後。
結論
對於在 Ubuntu 26.04 上運行 AMD 最新 RDNA4 顯示卡的 Linux 用戶而言，預設配置已經運行良好。為了在全新硬體上獲得可接受的 GPU 效能，而需要手動編譯或移植較新 Mesa 和核心版本的日子似乎正在消逝——至少對於 AMD 的開源驅動程式堆疊而言。這對更廣泛的 Linux 遊戲和工作站社群來說是個好消息，也證明了上游驅動程式開發的成熟度。
來源：Phoronix