On 21.11.21 12:47, Thorsten Leemhuis wrote: > Hi, this is your Linux kernel regression tracker speaking.
/me again > On 16.11.21 05:52, Harald Dunkel wrote: >> >> if I enable CONFIG_SYSFB_SIMPLEFB in 5.15.2 and use grub's default >> configuration >> (Debian sid amd64), then a few lines at the bottom of /dev/tty1 including >> login prompt are off-screen. Scrolling is broken. I can login, though. >> >> Enabling GRUB_TERMINAL=console in grub doesn't make a difference. Using >> the same kernel except for CONFIG_SYSFB_SIMPLEFB the problem is gone. >> >> Graphics card is a GeForce GTX 1650. I tried with both CONFIG_DRM_NOUVEAU >> and proprietary graphics drivers disabled. >> >> Attached you can find the config file. Please mail if I can help to track >> this problem down. > > Thx for the report. I'm not totally sure if this is a regression, as > that's a new config option. But it might be one considered a successor > to an older one, hence it might count as regression. Adding two > developers and a mailing list to the CC, hopefully someone can clarify. Javier, I'd be interested in your option on this. Harald, did you have CONFIG_X86_SYSFB enabled in earlier kernel versions (and did console scrolling work then)? The answer would help me to decide if this a regression, as those ideally should be fixed as quickly as possible. Ciao, Thorsten > TWIMC: To be sure this issue doesn't fall through the cracks unnoticed, > I'm adding it to regzbot, my Linux kernel regression tracking bot: > > #regzbot ^introduced 8633ef82f101c040427b57d4df7b706261420b94 > #regzbot title CONFIG_SYSFB_SIMPLEFB breaks console scrolling > #regzbot ignore-activity > > Ciao, Thorsten, your Linux kernel regression tracker. > > P.S.: If you want to know more about regzbot, check out its > web-interface, the getting start guide, and/or the references documentation: > > https://linux-regtracking.leemhuis.info/regzbot/ > https://gitlab.com/knurd42/regzbot/-/blob/main/docs/getting_started.md > https://gitlab.com/knurd42/regzbot/-/blob/main/docs/reference.md > > The last two documents will explain how you can interact with regzbot > yourself if your want to. > > Hint for the reporter: when reporting a regression it's in your interest > to tell #regzbot about it in the report, as that will ensure the > regression gets on the radar of regzbot and the regression tracker. > That's in your interest, as they will make sure the report won't fall > through the cracks unnoticed. > > Hint for developers: you normally don't need to care about regzbot, just > fix the issue as you normally would. Just remember to include a 'Link:' > tag to the report in the commit message, as explained in > Documentation/process/submitting-patches.rst > That aspect was recently was made more explicit in commit 1f57bd42b77c: > https://git.kernel.org/linus/1f57bd42b77c #regzbot title drm: CONFIG_SYSFB_SIMPLEFB breaks console scrolling
