I submitted a patch for that: https://lore.kernel.org/linux-input/20230318144206.14309-1-msizanoen@xxxxxxxxxxx/
On 3/18/23 19:08, Linux regression tracking (Thorsten Leemhuis) wrote:
Hi, Thorsten here, the Linux kernel's regression tracker. I noticed a regression report in bugzilla.kernel.org. Jason, apparently it's caused by a change of yours (3bc753c06dd0 ("kbuild: treat char as always unsigned")), which apparently caused a problem in drivers/input/mouse/focaltech.c to surface. Someone provided a patch already to fix it here: https://bugs.archlinux.org/task/77733?getfile=22498 Back to the bug. As many (most?) kernel developer don't keep an eye on bugzilla, I decided to forward it by mail. Quoting from https://bugzilla.kernel.org/show_bug.cgi?id=217211 :Barry 2023-03-17 13:51:10 UTC Created attachment 303972 [details] Kernel bisect result O/S: Archlinux. On any kernel release from 6.2 onwards I have found that the touchpad doesn't respond to multi finger touches properly. The pad works fine for single finger movement and single finger tap to click. If I click and hold the pad button and then use another finger to move such as for text selection, drag and drop, moving or resizing a window etc. Or if I try to use 2 finger scrolling then the mouse pointer jumps to the top or right or into the top right of the screen. All of this functionality worked as expected up to kernel 6.1.19. I have bisected the kernel and got the attached result. I have checked out kernel 6.2.6 and removed the `-funsigned-char` from the Makefile. Kernel 6.2.6 built with the modified Makefile restores the correct functionality. I believe the touchpad uses the psmouse driver so maybe the new build option has broken this driver.> I have bisected the kernel and got the attached result. I have checked out kernel 6.2.6 and removed the `-funsigned-char` from the Makefile. Kernel 6.2.6 built with the modified Makefile restores the correct functionality. I believe the touchpad uses the psmouse driver so maybe the new build option has broken this driver. [...] barry@xxxxxxxxxxxxxxxx 2023-03-18 11:49:27 UTC Hi. If you check this link which is my report of the same bug on the arch bug tracker there is a patch attached which fixes the issue. https://bugs.archlinux.org/task/77733#comment216336See the ticket for more details. [TLDR for the rest of this mail: I'm adding this report to the list of tracked Linux kernel regressions; the text you find below is based on a few templates paragraphs you might have encountered already in similar form.] BTW, let me use this mail to also add the report to the list of tracked regressions to ensure it's doesn't fall through the cracks: #regzbot introduced: 3bc753c06dd0 https://bugzilla.kernel.org/show_bug.cgi?id=217211 #regzbot title: kbuild/input: focaltech touchpad driver misbehaves due to a checke how to treat char #regzbot ignore-activity This isn't a regression? This issue or a fix for it are already discussed somewhere else? It was fixed already? You want to clarify when the regression started to happen? Or point out I got the title or something else totally wrong? Then just reply and tell me -- ideally while also telling regzbot about it, as explained by the page listed in the footer of this mail. Developers: When fixing the issue, remember to add 'Link:' tags pointing to the report (e.g. the buzgzilla ticket and maybe this mail as well, if this thread sees some discussion). See page linked in footer for details. Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr If I did something stupid, please tell me, as explained on that page.
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