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On Mon, Apr 5, 2021, 13:13 Alan Mackenzie <acm@×××.de> wrote: |
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> Hello, Wol. |
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> |
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> On Mon, Apr 05, 2021 at 18:44:15 +0100, antlists wrote: |
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> > On 05/04/2021 18:12, Alan Mackenzie wrote: |
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> > > Bug reports and other comments are welcome, of course. |
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> > > |
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> > > If anybody would like the corresponding patch which works on 5.4.n, |
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> for n |
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> > >> = 80, that is available, too. |
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> |
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> > Why did it get removed from the kernel? |
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> |
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> Allegedly, there were security problems with it. I think the kernel |
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> people had a program which fired random inputs at lots of components, |
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> and noted when things went wrong; and things went wrong in the scroll |
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> back component. And they couldn't find anybody to look into these |
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> problems. |
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> |
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> That's the official position. I'm a bit more cynical about it. |
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> |
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> > If you want to get it back in, couldn't you ping Greg KH and get some |
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> > help - or even just advice - getting it accepted? |
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> |
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> I have no reason to believe all the "security problems" will have been |
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> resolved by my hacking. I took the algorithmic bits from 4.19.97 |
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> basically unchanged. |
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> |
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> Maybe there's not much enthusiasm for this feature, in which case I will |
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> keep it working for myself. Linux is basically unusable to me without |
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> it. There are probably quite a few patches to restore the scrollback |
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> floating around the web by now: the changes were not particularly |
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> difficult to anybody who knows the code, but getting to know the code |
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> was unusually difficult. |
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> |
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> We'll see how people react to it here, first. |
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> |
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> > Cheers, |
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> > Wol |
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> |
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> -- |
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> Alan Mackenzie (Nuremberg, Germany). |
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Without looking at the patch itself: |
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Have you considered something like kmscon as a userland alternative? |
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I installed it on my laptop, and aside from not working with gpmd or |
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consolation for mouse support, it's a perfectly functional local tty. |