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I bisected this between >> v6.14-rc5 and next-20250307 and got this as the first bad commit: >> >> 7ffb791423c7c518269a9aad35039ef824a40adb is the first bad commit >> commit 7ffb791423c7c518269a9aad35039ef824a40adb (HEAD) >> Author: Balbir Singh >> Date: Fri Feb 7 10:42:34 2025 +1100 >> >> x86/kaslr: Reduce KASLR entropy on most x86 systems >> >> Reverting commit 7ffb791423c7 in next-20250307 fixes the issue for me. >> > > Thanks for the report! Could you also share the dmesg? Do you have any proprietary > modules loaded? Could you also share the output of /proc/iomem (captured as sudo)? > The lspci output is useful, lspci -vvv (captured with sudo) would help see where > the BAR regions are, specifically before and after the patch. Could you also share > the kernel config? > > I assume your config has CONFIG_PCI_P2PDMA enabled. Did the system ever work with > nokaslr for you? > > I am a little surprised that reducing the entropy causes these issues and having > a larger direct map causes these issues. Hi, Bert I tried to reproduce the issue at my end, but could not. I am new to Steam and my hardware/games are also different. From what I could gather, Steam is a 32 bit application that uses SDL. For my testing I used Xorg, not wayland In addition to the above? 1. Could you confirm if the mouse/keyboard work outside of Steam? 2. Does evtest /dev/input/ show anything? 3. We could run the kernel with nokaslr and see if the issue reproduces? 4. As a test, we could try disabling CONFIG_PCI_P2PDMA in the kernel config, build boot and test, this has the same effect has not having the patch Balbir